More to the point of your post, the agreement of sale should have language detailing precisely how the escrow funds are released to buyer or seller.

I would be a job for you, but could be lucrative depending on how you structure the agreement.

From Atty Tristan Pettit about the Koble case: "if a landlord has a void rental agreement (i.e., the rental agreement contains one of the “10 Deadly Sins” as set forth in Wis.

I assume you meant, regardless whether the person named in the note actually lends their own money, it's still owed to them because the agreement is binding. 

Review their management agreement.

You are selling the business itself and with the sale of the business, the electronic assets get included.I've heard of people doing this exact thing to circumvent non-transferable agreements.

The seller will lose some rent, potentially incur costs to evict, possibly costs to clean out the units depending on your sales agreement.

Work with a real estate attorney to draft a formal agreement that outlines responsibilities and protects both parties. 

If they won't let you build on it, explore doing a lot tie agreement so that you can combine the parcels and when you go to resell it, you can ask for a higher price point based on the large lot.

I can have an agreement where I make payments to my mom starting at a further date and just not put a lien on the house.