For comparison, Spring Mountain Motorsports Park near Vegas (well, 60 miles near) is now something like $35k up front, plus $400/month, plus daily fee ($65 iirc). It's getting to be really nice and it'll soon have a 6 mile configuration. Six. Miles.
'11 E90 M3, Mebourne/Black/Fox Red/Black, 6MT, roof, PP2, heated seats, moonroof, split folding rear seats, iPod/USB adapter -- 8/8/11 euro delivery! Technic harness, JL XD 6/600.