I'll tell the Pumpkin Ridge story, since it's a different model.
No houses, 36 holes, one public and one private course on 340 acres. The public greens fees are supposed to subsidize member costs. Greens fees at the public course are around $150 in the summer for the casual or one time visitor. Repeat users of the public course can get a good deal where they can play for $70 or so.
Both courses are good, one course is not dramatically better than the other. Full club members can play either course.
The club cost $17-20M to build in 1990-2. After a few years, the silent partner who put up most of the money wanted his money back, and in 1997, the partners sold a portion of the Club (with a 49% voting share) to American Golf at a modest premium, with several caveats regarding usage and conditioning. The silent partner was repaid.
After 15 years, Pumpkin Ridge is doing fine financially. It has more or less reached its goal of 525 regular members, plus 100-150 other national and junior members. It is very busy during the summer. Both courses get about 30-35 thousand rounds per year. Pumpkin Ridge members complain that our private course isn't very private, as they allow outside play quite liberally. But it's really a nice place, and though it's a bit crowded, it has a nice, social, family atmosphere. It is a success.
The Club always has the option of adding to the membership, and privatizing the public course in the future, an option I always advocate.
Another club across the valley in Aloha (Oregon), The Reserve, has attempted the same business model.
The two course model, with two very good courses, one open to the public, can work.