These are popular with condo conversion properties where they were turned into multifamily rentals but now make sense to sell at a higher price one by one.The loan agreement will usually spell out that for each one you sell they release the lien on that one property and so much of the sale has to go down to retire the overall loan out of the proceeds. 

I do fully spell that out up front as well, so the sellers know what to expect, I dont like anyone to have surprises.I also work with an investor that will pay cash for the home once a buyer who cant get a bank loan gets approved with them.

In Columbus, GA and Phenix City, AL (correct spelling) there are deals as well, especially on SFR rehabs.

GJ spelling it out.

Instruments between you and  your lender;Promissory note spelling out termsFirst mortgage on the property for lenderInsurance naming lender as mortgagee /  additionial insured.Does that help

(I also ask for more contacts in case they are busy).Our operating agreement and Will clearly spell out who will handle what in case something happens to my wife and I.

If your lease doesn't spell out what happens if a tenant breaks their lease then you may have to consider this an expensive lesson on having a thorough lease agreement.

This allows us to have a robust LLC agreement that clearly spells out the details of how the business is managed, who makes decisions, who can bind the LLC, when and how profit distributions are made to the members (the term for owners of an LLC), what happens if a member dies or divorces, whether a member can sell, transfer, or otherwise pledge his or her interest in the LLC, how the business is funded, and more.  

Information is spelled out in the addendums you signed

Although I don't know the laws in PA (truthfully I can't even spell your state...)