When I try to find out who the mortgage company may be I run into a wall and it has not made it to the MLS listings.

When I built these for Gary I didn't actually build the whole house floorplan, I just created standalone rooms and added some extra walls to give the appearance that it was part of a bigger house. 

I've started modelling the cost benefit of selling a couple of our properties and reinvesting the proceeds elsewhere versus the cash-flow of retaining them. 

A shout out to @Chris Clothier and Memphis Invest for the mention in Saturday's Wall Street Journal.  

A fee days later I saw the side of the stucco garage where he left a car transmission laying there that punctured a hole in the side of the wall.

Stackable instead of single wall stick build. 

If not, tell them you will get another contractor to come in and install it while the walls are open.

But they only need to be installed if you start tearing up walls and ceilings.Otherwise, some of these items will depend on the city inspector at the time and if they'll issue a valid COC.  

Can friend get an inspection showing it's in ok condtion and somehow legally retain the lease that was already signed?

Another example was a small dent in a wall that didn't need to be filled in that I puttied anyway... then realized that was one of the few walls in the house that I wasn't going to repaint and I didn't have the original paint color.