Seems like a nice climate and a few hills wouldn't hurt.
Uh I think you have the wrong impression of what hill country hills look like. We are talking about semi arid high desert, not gentle rolling green hills. Fishing is great there are lakes all over the place, all man made and most are cooling lakes for coal fired power planets.
Hunting is a different story, over ninety percent of land is privately owned and hunting is an expensive proposition. There is very little public land to hunt in fact I have never hunted on public land. A decent lease is going to run you $7,000.00 or more per gun hunting in Texas is big business.