If there is little to no equity in a property sale ( short sale ) that has a IRS, FTB, type lien then they typically do a partial release for 0$ or for their equitable position. 

I get a quick inspection and if it meets my OK, we close and if not I release the seller FAST so they can continue marketing their property.

If Bigger Pockets does release the Buy and Hold Calculator, would you buy it?

What about a concrete patio, door height the width of the area that comes out on the left and extends to right to the driveway where you could step down.

In the future, anyone who asks to have family stay for extended periods should be told that more than X # of weeks is a violation of the lease and housing law and isn't permitted. 

In addition to what a normal wall takes to build wall rated for sound is typically double rocked with brackets with rubber feet screwed into studs that attach to horizontal track for the drywall, sound dampening insulation, any electrical will need to be reworked into boxes that extend that far, then sound caulk all the way around the edges of the wall and electrical boxes.

The other case the owner was over extended and could not manage it well.

Do a straight lease and option. 60 days before you want to sell, convert the option to a purchase agreement, assign that agreement, or if you find a buyer and can work with the seller, you release your option for a fee allowing the seller to contract with the buyer, there is no assignment issue.

@Tom Gimer  bank if they paid for title insurance would release and make a claim I am thinking.but you know title insurance darn hard to get ..

These documents authorize the release of information regarding the mortgage and insurance.Hope this helps!