Track day at TMS was $100, it's not a road course. I have no idea what it would cost now, but it is more!
We have a road course southwest of Fort Worth, not a "World Class" track, but there just the same. I beleive there are some club membership and usage fees, but if I recall correctly they are much, much less than the TMS fees. My, long since deceased, brother-in-law took a track car out on that course several times. I think he rented the car from a member and advised me it cost less than going to TMS for a few rounds of the track. He then commenced a Cobra replica build to take to that track. Unfortuately, he never finished the build.
I am sure there are several track options, and would hope that you would get what you paid for....being more money equaling more track, more time on the track, more facilities.
I doubt that 100 cars is even close to being realistic, we don't get that many to a Nationals event. I'm thinking that Paul is looking at some unobtainium with wistful eyes and a Mach 1 track car in the garage.