An ideal part of the state would be West of Ft. Worth, but not too far North or South from it.
Then, about 75 miles or more from a major city.
That gets you away from the Southern border, tornado alley, Hurricanes, and the clouds of hungry mosquitos.
If you're not in a town though, or pretty close to one, plan on having a water well and a septic system.
Another concern is our electric grid. It's usually fine, but for different reasons, there are power outages.
They usually get fixed fairly quickly,
but having a decent size dual fuel generator will come in handy for a few hours or a day or so once or twice a year.