I will allow them to cure the cat problem by also obtaining professional carpet cleaning which specializes in cleaning carpets with cat urine and soil, and perhaps a warranty against cat odors.

I'm not saying its not possible to have structural damage, just that its not as likely as you might think since you walk underneath the tub every day and can see the signs of a leak before it gets out of control. 

What do you generally do in poor soil conditions ( if you have run into this.... ) a structural basement, or crawlspace?

@Michael Core My recommendation is to have it underneath one roof.

We do 42 tall cabinets so it would end up being a shorter cabinet probably 24 wide with a small 3-4 bottle cabinet underneath to make the full 42.

Wasn't an issue back when they bought it, and luckily the soil tested clean when they removed. 

It's unusual to find an older property without lead paint underneath other layers. 

As stated above, you don't really know the time and materials involved (from just tamping down the soil around it, which means maybe it is high all the way to pulling the post, re-digging the hole, and resetting it in sharp gravel or concrete, in which case you got an ok deal based on my labor and materials rates). 

For the most part, carpet that has been wet for more than 24-48 hours should be removed and replaced, and in all cases the padding and subfloor underneath should be dry.

Most roofers would not (or should not) install that many layers for several reasons: voided shingle warranty, accelerated shingle deterioration because of the layers underneath, and constant callbacks for nails backing out of the shingles due to the nails being too short to grab wood roof deck under all the shingles.