The second floor apartment was larger, but kept very messy; i.e. pet hair everywhere, spilled food, and the very heavy scent of unwashed clothing/bedding and cat spray (the tenants had 3+ cats in there).

You could probably hire out or perform the driling and rebar aspects yourself, just have a crew come in and spray the concrete; surely you could achieve this for less than $42,000.!  

@Michael BuckleyThere is a info commercial I have seen on TV, two guys fishing in a boat with the bottom of the boat sprayed with a can of some kind of rubber sealer.  

My buddy and I were getting sprayed in the face while we were trying to tap the end of the water line shut.  

It's a shame you waited until after the floors as you could have sprayed.  

Always wear a respirator and and dampen a work area with a spray bottle of water if you do choose to disturb such products.

The HVAC system, spray foam insulation, and sheetrock were outsourced to contractors, two of whom financed the work.To make a long story short, the build took about 2 months to complete.

Assuming you've fixed the leak and dried it out... spray the walls with your choice of chemical like chlorox.

Some units before at the apartment complex the inherited smoker tenants when they left you had to spray down all the walls to take off the smoke before you could even Kilz it.

Should I use a spray to kill him then try and patch it up I have traps set and only get squirrels and cats.Any help?