https://barneswalker.com/seller-financing-restrictions-under-the-dodd-frank-act/ I understand Dodd-Frank more on how it applies to "traditional" lender financing, but if you have any specific questions I'd be glad to help.

This subsection shall not apply to any action initiated by the enforcing authority.

The following applies in either an IRA or 401(k).The transaction you describe is considered a flip, or a dealer transaction. 

I would use this as an opportunity to get them all out.If one of the tenants wants to stay, make him apply and verify he can afford it on their own.

The idea is to consider the single-wide as the "primary" unit (that's how it's being sold) and apply for a construction loan to finance both the primary unit (the man home) and the future ADU. 

In New York it seems that anyone can just apply and you have to accept them.  

We have a good cleaning team and handyman if needed.It isn't that hard really, but remember, your usage must be 14 days per year or less if you want to take advantage of all the deduction of expenses for running a vacation rental home.As far as loans go, we just applied for a 2nd home loan and that was that.

The third pillar applies after you have good insurance You need to protect yourself from what insurance doesn’t cover by compartmentalizing your assets.

Perhaps this information will help clarify the issue you are facing with structuring a deal as you propose.There is no statutory guideline with specific numbers that applies to your question.

If you are putting the investors together and taking fees, etc, you are syndicating and the same legal framework that applies to the sponsor buying the real estate applies to you.