First off, I don't want it to focus on and be built around a golf course - the world has an excess of those. However, I still plan to have a country club - only it will be for a racetrack. The indulgence of the community will be for driving fast cars fast.
That said, I hate commuting, so I want to to be structured around not needing a car to get by. Ideally, day-to-day travel can be done on foot or via public transportation. The details are still being worked out in my dementobrain. I want it far enough from municipalities that it can be run with HOA and deed restriction governing, but close enough for a bearable trip via light-rail or more preferably by bullet train into San Antonio and Austin (the trains ought to be equipped with WiFi to encourage the move out to my dreamland).
I want the place to be a haven for car nerds and have ways of transporting cars that are not strictly street legal to and from the track(s). I want people to be close enough to each other to inspire a sense of community but still have that time-honored American need for some isolation. That and the transportation stuff is proving the most difficult to conceive.
I think that a lot of parks with easy access and easy monitoring would be a great alternative to lawns, if it can be executed properly. I want to be as self-sufficient with energy as possible with solar/wind fields incorporated into the community. I want a family-friendly, eco-conscious society that gravitates toward powersports. My motorsports complex would incorporate a wide variety of sports and be set up for large racing events to take place there. I would like to attract high-profile racing there to encourage the overall buildup of the place. I want it to be a visitor-friendly place that encourages learning in a hands-on way. I want to foster an environment of thinking and real community. Americans are terrible at community. The advantage of such a car-themed community would be a thread connecting the residents.
From the business side, I want to have timeshares and rentable storage next to the track to draw in visiting outsiders. I want the place to draw tourists and enthusiasts and their dollars for short stays. The motorsports park could be the largest of its kind in the world, and I would welcome virtually every form of racing short of NASCAR - maybe even drag-racing.
I would invite universities and companies to compete in green competitions - either racing or parameter challenges (like mpg shootouts or zero-emissions endurance racing).
In short, I plan to remedy most of America's problems in my uber-society.