Other than that, just plumb in a bath and kitchen and laundry and your g2g.

Dont turn the water on at all until you can get in the house. and then have people stationed on each floor to listen and watch for leaks.OMG what a RISK. even with a house being properly winterized by a so called professional company things fail.Just to mention a few,, outdoor sill cocks.. dishwashers,, ice makers in refrigerators, washing machines, and radiators. to mention a few some forget,  any and everything that's had or supplies water in it is potential for a leak and you won't know till your there and turn it back on.When you do turn water on DO it SLOWLY,  have faucets open and as water starts running and air is forced out then turn off each faucet.

He disconnected his phone, and has even seemed to start another business as he posts on the local Facebook trading post offering to power wash big rigs.

As long as you don't lose more than that, then it is a wash/you are ahead. 

Overall, the project includes 21 bedrooms each with a private bath, plus there will be an additional community bath and a community laundry on each of the three floors. 

Because I was planning on adding a separate entrance to the basement (SDU) my contactor also demo'd the stairs (from the main house to the basements) and in the place of stairs we created a laundry room, because the W/D needed to be added to the main house as well. 

I have been researching ITP and specifically driving the west side (hunter hills, wash lark, Mozley, west view, west end, grove park) to get a feel for what the condition is like and how far is it from developing.

I skip traced her and spoke with her and she's open to talking with me, I have and told her I was interested taking the property/properties off her hands and making it easy and fast as possible so she can wash her hands and move and take care of her sister.

In the bedrooms (which aren't nearly as bad) we are planning on washing everything with TSP and then sealing with BIN or Kilz before we paint, but I was hoping to get opinions from others with experience: any thoughts as to whether we should even try to clean and seal this room, or whether we should go ahead and rip out the drywall and start fresh?

Prior to painting dirty walls/ceilings; use TSP to wash them down.