If you're looking for an existing home, I would recommend contacting a local realtor. They can simplify your search dramatically. If you think you might like to purchase a piece of property and build, a "google" search should provide websites of several communities in the area that can provide this option.
River Chase on the Guadalupe
It's a good life!
Aja Edwards, Realtor
ERA D. Lee Edwards Realty, Inc.
New Braunfels, TX