I live in the DFW area and have been training/CFI-ing here for the past 3 years. I've only worked for one school as a CFI but I have friends at most of the schools around. I don't know much about PlaneSet at TKI, but I have a good friend who spent time at Texas American and I'll be seeing him later this week. Send me a PM with specific questions or if you're looking into any other schools in the area.

Plenty of opportunities for your wife to work in DFW (I've been living off my wife's income for some time now ) and it's a great place to learn to fly and to teach IMO.