I get my lists from the county for houses that are delinquent on taxes and house that have Health/Sanitation or Safety code violations.

I can hack at programming things (ie: read code) but you want me to write it?  

This is intended to apply specifically to homestead property (primary residence), but many lenders interpret the code to apply to all residential property in Texas.  

We are building the criteria on listsource.com and basing it on certain zip codes, homeowners age, home equity and some other criteria.

I would search out a few members through the Find Members section, and search by zip code of the areas you want to move to.  

The world is telling you to go with copper.While you're at it, I'd recommend going one or two gauges thicker than is required by the current building code.

Several leaks, polybutylene, mold, issues with the roof, shorts in smoke detectors and the hot water heater not meeting code.  

It is an older home so are you going to have to rewire the entire house to bring it up to code?

The authors of the tax code wanted to encourage home ownership, which is supposed to embody "the American Dream".

He is trying to charge extra for work they underbid to put in French doors, a water heater "broke" as they were raising the height of it up to code...I would accept the cost of a new one but not sure how it is my responsibility for labor to put it in since they had to do so anyways and no one wants to claim responsibility for it "breaking"?