The Austin area is noted for being the most tolerant area of the State. I would stay close to Austin. Wimberly would be a good choice. I know a gay couple who have lived there for over 30 years, so it must not be bad. Another area would be Lago Vista on the north shore of Lake Travis. It is about 45 minutes from Austin. Lake Travis has a public park (hippie hollow} which is clothing optional. It has a large section which attracts a large number of gays. A minister tryed to shut it down a number of years ago and got a lot of resistance from the entire Austin community. He moved to another town in Texas. You can still get a nice house with a lake view in this area in your price range.