If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

The cryptocurrency simply acts as a collateral of value to enforce the deal, and doesn't change hands.

You should ask for the leases and read them to see what exactly you are inheriting to better understand what you are on the hook for.As far as the past due rent, not sure why the owners think that you should be on the hook for them not enforcing a lease agreement properly, but maybe you can make a deal with them that passes on the $200 per month as long as he pays it. 

If it's not a lien any longer, then how could the HOA enforce this? 

The landlord CANNOT use tactics to enforce restraining orders.

2) How do the city even enforce it if four roommates are too many?

Don't do a "table top" closing.And of course once the bank learns that you are taking over the loan they can enforce the Due on Sale clause.

Here was the response I got from the assistant director-"Currently, there is no legislation that allows Airbnb’s to operate in the City of Atlanta.

I would imagine utilities and fire separation are going to be the 2 chief concerns, and you're going to have to check with your local code enforcement division or a good, licensed contractor to figure out exactly what you will have to do to rent those spaces separately.

I am not familiar with the zoning boards, but have heard they can be very political despite an investors best intentions for the property and neighborhood.Illegal duplexes exist all over the city, and I’ve heard that continuing to use it as such is less of a risk due to the lack of enforcement by the city.