Donnymac,
It is another "it's easier than it looks" situation.
Some SCCA types built a new track in Eastern Oregon called Grass Valley. And after a soft opening last year, they have had to hire another race track design/construct firm to re-do some pretty major items. I can track down the "new firm", if you need, they are hdqtr'd in B.C.
While I assume the track you have in mind is for cars, keep in mind the other potential users---karts,bikes,drag's and driving schools. Plus City,County,State and Federal Agencies that do their own in-house training and driver Certification. This list is pretty endless.
From my understanding race tracks are either for fun or for profit. But almost never both. FYI Laguna Seca, Portland International and Miller Motorsports Parks, and probably a few others, are part of or closely involved with a local municipal park system. That involvement, from what I have been told, has generally more "pro's" than "cons" for long term operations and maintenance funding, and there may be additional tax benefits/considerations in the mix.
Sounds Very, Very Interesting to me.
Good Luck and keep us up to date on your progress.