Make you you caulk eveything water tight. 

If you are water tight they will just keep filing legal motions that force you to run up huge legal bills that will eventually force you to settle just to keep your sanity.  

They have to do the installation and make sure that it is water tight the same day everything is installed.

- You will want to make sure that the properties windows are either in good shape or new.Flooring - has the flooring been updated with water-tight flooring?  

Contributing to this might be that my walls are also spray foam this exaggerates it since the house is very tight other than the small air leaks that are in the insulation.I was told by my contractor and the spray foam contractor that this foam didn’t need a vapor barrier since it dries with a water tight skin on it.

Some might argue you are supposed to keep a watertight flood proof basement eh?

While they are leasing a property, their on-time payments can be applied to their credit scores (there is a neat system I found via google for doing this), so their rent can help their credit.I'm currently doing one lease option this way... but be sure you have a water-tight lease agreement AND option contract with the tenants.  

Great care is taken to make sure window and door openings are watertight and waterproof. 

The tub is not properly water tight and will be a huge problem in the future. 

Even if you did, I wonder about egress and accessibility, since it's in the backyardIt's a water tight 800 sq ft.