Slab has 2 bad (in my opinion) options...1) The pipes are laid under a foot of dirt and 4" - 6" of concrete.  2)  The pipes run through the attic, which has a tendency to rattle, when the hot water is turned on, and is not a pretty situation, when a leak occurs.

Really it was a mistake of the architect first and foremost because the engineer can just do math on anything that is given to him but still problems occur.

The closing has occurred, you have merely provided financing to the buyer.  

You going after prospects - I typically stick with people that have had an "event" occur to change their situation.  

A joint tenant may alienate his property, but if that occurs, the tenancy is changed to a tenancy in common and no tenant has a right of survivorship.

We are shooting for that to occur in abt 8 years.

As an investor, I would be really worried that the tenant won't be able to make rent payments after a while especially if some kind of salary reduction or job loss were to occur or some other kind of financial emergency were to happen. 

The crack occurred at a stress point.

what happens if some more serious structural issues occur?

Talk to an attorney regarding the LLC.You will likely want to make sure the following occur with the LLC.Transfer title to the LLC.Update lease agreement to show lease is with LLCGet insurance under the LLCetcBest of luck