I own a unit at a local condominium complex and am having issues with timely response from the HOA. 

Who owns the solar panels and what's my liability if I continue with the purchase?

You can't take any deduction on your tax return or claim any depreciation on a property owned by the IRA, just like you can't take deduction or depreciation on a property I own.

The general idea is that you must acquire an interest in real property you do not already own, and since you already own the subject real property you want to build on, the transaction must be structured so that you are creating an interest in real property you do not already own (in fact, it does not yet exist).

Now you are saying you have no experience owning/operating an STR, that's another hit.  

Live in the multi-family for a year, then move back into your own home and rent out the unit.If if not ideal, it's worth the hassle. 

I own a few rentals near the Memphis international airport.

I own a small portfolio that brings enough income for me not to have a w-2 income.

If your new LLC is a disregarded entity (single-member or owned solely by you and your spouse in a community property state), it won’t trigger a taxable event, and you’ll continue reporting income on your personal return.

I know many people who own real estate that are not citizens of the US.