It's R10 (In Nashville that means two units is allowed as long as lot is 10,000 SF which it is) so a second unit should be fine, but if I have codes come out to make the apt officially legally livable, what would happen?

@Jaeseok An advice from experience host like yourself just to be prepared on what to expect when I officially start from the good to the bad

I suspect the sunset language will be amended and extended.The language basically says if your renting a single unit (SFR/condo) or live in half a duplex, the law does not apply.

My official day job is giving them the drug screens at a medical clinic. 

I also just finished Rich Dad Poor Dad, the seemingly official bible on entrepreneurship.

Actual cash does not have to exchange hands.This sets the incredibly important precedent with the tenant that rent is separate from capex improvements and these improvements must be handled with your authorization and in an official manner. 

They (ordinarily, per the standard disclosure language) did not give the PM permission to share that information.

Unfortunately, I don't speak the language so currently looking to develop a trusted network of real estate agents, property managers and lawyers/insurers.Has any of you already invested in this country (in particular Bilbao or Valencia areas) ?

Many contracts have language to the effect of "This contract may not be assigned to another party by the buyer" in order to protect the seller from unscrupulous wholesalers.

Granted, English is my second language, and IRS is my third, which probably explains why I am struggling to see how being a landlord fits into the above definition.