There is a lot to consider when looking for property to build a pond or lake on. Not just because I work there but you will definitely want to pick up a copy of Bob's book Perfect Pond. It will be an invaluable resource.

As far as a part of Texas to build in. This is a big state and there are a wide variety of terrain and ecological changes. Average rainfall is better in East Texas but don't rule out Central or Even West Texas. If conditions are right and you find the right property it might be possible to build a pond there. Not only is Avg rainfall important but also amount of runoff acreage that you have around and that feed into that pond. When you get closer to that day let me know I'd be happy to help out.

Welcome to the forum and the Pond Boss family.

Fisheries Biologist, Texoma Hatchery.
www.texomahatchery.com