It's easy to deal with a cut and dry eviction but they will not help me!

Unfortunately, dry walling is out of the question. 

If it is bad enough they may help with any inconveniences for the tenant.I also compensated the tenant for their energy bill since they had to run industrial dryers for a couple of days to dry everything out.

the mom is the enabler. looks like she never cut the cord, and this will bleed her dry.

After the inspector left, while uninstalled because of drywall drying, the toilet mysteriously was dropped on it's side shattering with major water spillage and going down into basement. 

The old carpet has been removed, and the basement is dry, and I just need to wait for a plumber to get out there and figure out why this happened (or if she flooded it and isn’t telling me). 

The drywall patch and repair alone requires multiple steps with dry time included. 

I can see a wet band along the bottom, but without knowing how long it's been wet and how far the moisture has penetrated the panels, it's difficult to gauge their long-term condition.I would try letting it dry out and see what you got.

Nothing wrong with keeping a little powder dry...

It's a red flag to me that the seller is just hanging this family member out to dry by selling the place out from under him.