@Marcos CarbiYou're not looking at this situation realistically. 

I sold a mobile home giving Owner Financing (OF) (never again will I offer OF).  The buyer had the mobile home demolished.  Crazy I know.  She is now in arrears 3 months and has agreed to deed the land back to me and ...

If you provide any kind of substantial services like catering, car service, etc you will change you tax situation and no longer can file under Schedule E.

Any legal issues I should be aware of in this situation? 

But In your situation you could purchase the SFH for most of your cash. 

This was the kind of situation where most people would turn around and walk away, but not us.

.- Creative Financing Solutions:Options like subject-to deals, seller financing, and syndications can lower capital requirements and increase your purchasing power while providing flexibility for properties with complex financial situations.4.

In high-cost markets like Chicago, that can be tough to meet.If you're looking at a duplex, the self-sufficiency test doesn’t apply, so you’d just need to qualify based on your personal income and the rental income your lender allows.If your current lender isn’t familiar with making FHA work in your situation, it might be worth getting a second opinion from someone experienced with FHA multi-unit financing.

When speaking with them, demonstrate genuine interest in their situation and goals.

Quote from @Samuel Hudson: Hello friends I am new the market and recently bought a home in Weehawken 6 months backs .Its a three family home and we are currently doing renovations Right now.The rent leveling board told me that two units would have to follow a rent of 1650 for unit 1 which has three bedrooms and another unknown amount for unit 2 which they don’t have the information for .The previous seller I purchased the property from bought it as a tax lien .He has kept the property vacant for two years with no tenants before selling it to me .However ,the previous Owner he bought it from must have had tenants .I am putting in a lot of money into renovations and want some clarity on the situation I am in .The property has been vacant for the two years and currently still is as we are doing renovation .It would be really appreciated if anyone can assist me on what information needs to be provided by from the previous seller for me to be able to set the rent based on the market value .Thank you .