If you’re exploring passive investing in mobile home parks, you’ve probably come across the terms 506(b) and 506(c). These are two of the most commonly used exemptions under Regulation D of the Securities Act of 1933 — and understanding the difference between them is essential for anyone evaluating a mobile home park syndication deal.

At Keel Team, we operate under a 506(b) exemption, and there are specific reasons why. In this post, we’ll break down exactly what each exemption means, how they differ, and what those differences mean for you as a passive investor or someone learning about the space.

What Is Regulation D?

Regulation D — commonly called “Reg D” — is a set of SEC rules that allows companies, including real estate syndications, to raise private capital without going through the full SEC registration process. Instead of filing a public offering, operators can raise money from qualified investors under one of several exemptions.

For mobile home park syndications, the two most relevant exemptions are Rule 506(b) and Rule 506(c). Both allow sponsors to raise significant capital, but they operate under very different rules around who can invest and how the deal can be marketed.

What Is a 506(b) Offering?

A 506(b) offering is the more traditional form of private placement in real estate. Under this exemption:

• No general solicitation is allowed. The operator cannot publicly advertise the investment opportunity. That means no Facebook ads, no cold outreach to strangers, and no public deal announcements.
• Up to 35 non-accredited investors can participate, provided they are “sophisticated” — meaning they have sufficient knowledge and experience to understand and evaluate the risks of the investment.
• Unlimited accredited investors can participate.
• Investors can self-certify their accredited status. No tax returns or bank statements need to be sent to the sponsor.

The 506(b) structure rewards relationship-first capital raising. Operators build trust over time through education, content, and genuine relationships — so when a deal comes to market, their investor community already knows the operator, understands the strategy, and has had time to ask questions. This is the approach Keel Team has taken from day one.

What Is a 506(c) Offering?

A 506(c) offering was created under the JOBS Act of 2012 and became effective in 2013. It introduced one major change to the Reg D landscape: the ability to publicly advertise an investment opportunity. Under this exemption:

• General solicitation IS allowed. Operators can publicly market the investment — through social media, websites, podcasts, paid advertising, and more.
• Only accredited investors can participate. There is no allowance for non-accredited investors, even sophisticated ones.
• Accredited investor status must be independently verified. Sponsors must take reasonable steps to confirm accreditation — typically by reviewing tax returns, W-2s, bank statements, or obtaining a letter from a licensed CPA or attorney.

The 506(c) structure appeals to operators who want to reach a broader audience quickly. However, the verification burden can create real friction. Many investors are understandably uncomfortable sharing sensitive financial documents with a sponsor they’ve never met.

506(b) vs. 506(c): Key Differences Side by Side

Here’s how the two exemptions compare across the factors that matter most:

• Public Advertising: Not allowed under 506(b) — fully allowed under 506(c)
• Non-Accredited Investors: Up to 35 sophisticated investors allowed under 506(b) — zero allowed under 506(c)
• Accredited Investor Verification: Self-certification accepted under 506(b) — independent verification required under 506(c)
• Investor Relationship: Pre-existing or established relationship typically required under 506(b) — investors can be strangers under 506(c)
• Marketing Approach: Relationship-driven and content-first under 506(b) — paid advertising and broad outreach permitted under 506(c)

Why Relationship-Driven Operators Prefer 506(b)

The majority of established mobile home park operators — particularly those with strong track records and loyal investor communities — gravitate toward the 506(b) framework. The reason is straightforward.

Think about what passive investing actually requires: you’re trusting someone else to acquire, operate, and eventually exit a multi-million dollar asset on your behalf. That level of trust doesn’t get built through a Google ad. It gets built through consistent education, transparent communication, and a demonstrable track record over time.

That’s the philosophy behind everything Keel Team publishes. Before an investor ever sees a deal summary, we want them to understand how mobile home parks work, what we look for in an acquisition, how we manage our properties, and what kind of returns are realistic. Posts like What Returns Can You Expect from Passive Mobile Home Park Investments? and How to Evaluate Risk in a Mobile Home Park Syndication exist precisely for this reason.

The 506(b) model essentially requires sponsors to earn the right to present a deal. That filter tends to produce more aligned, long-term investors — which is better for everyone involved.

What This Means for You as a Passive Investor

If you’re evaluating mobile home park syndication opportunities, here’s what to keep in mind about deal structure:

In a 506(b) Deal

• You likely have an existing relationship with — or have been educated by — the operator before being presented with an investment opportunity.
• You can self-certify your accredited status. No sensitive financial documents required upfront.
• If you’re not yet accredited but have significant investing experience, you may still be eligible as a “sophisticated investor” at the operator’s discretion.

In a 506(c) Deal

• You may have discovered the investment through a public source — a podcast, an ad, or a social media post.
• You’ll need to provide documentation to verify your accredited investor status before investing.
• The investor pool may be larger and less curated, which can sometimes mean less personalized investor communication.

Neither structure is inherently better — but they do reflect fundamentally different approaches to building an investor base. The 506(b) model requires operators to invest in education and relationship-building long before a deal is ever presented. That investment in trust is something we take seriously at Keel Team.

What Does “Accredited Investor” Actually Mean?

Since both structures involve accredited investors, it’s worth being precise on the definition. The SEC defines an accredited investor as someone who meets at least one of the following criteria:

• Income: Annual income of $200,000 (or $300,000 jointly with a spouse or spousal equivalent) in each of the past two years, with a reasonable expectation of the same in the current year.
• Net Worth: A net worth exceeding $1 million, excluding the value of your primary residence.
• Professional Credentials: Holding an active FINRA Series 7, Series 65, or Series 82 license in good standing.

If you don’t meet any of these thresholds, you may still qualify as a sophisticated investor under a 506(b) structure — someone with enough knowledge and experience in financial matters to evaluate the merits and risks of a prospective investment. Understanding where you fall matters when determining which deals you may be eligible to participate in.

Understanding the Full Picture: Waterfall Structures and Returns

Once you understand the regulatory framework, the next layer is how returns are actually structured inside a mobile home park syndication — which is where waterfall structures come in. Our post on What Is a Waterfall Structure in Real Estate Syndication? walks through exactly how cash flow and profits get distributed between passive investors and the operating sponsor. It’s a must-read before evaluating any deal.

The Bottom Line

Understanding the difference between 506(b) and 506(c) is foundational knowledge for anyone exploring mobile home park investing. It shapes the relationship between you and the operator, how you’ll be introduced to opportunities, and what the onboarding process looks like.

At Keel Team, we’ve chosen the 506(b) path because we believe the best investments start with the best relationships. Our goal is straightforward: educate first, build trust over time, and partner with investors who are genuinely aligned with our long-term approach to mobile home park investing.

If you want to go deeper on how mobile home park syndications work, our full Mobile Home Park Syndication guide is a great place to start. And if you’d like to connect with us directly, reach out at keelteam.com/contact-us.