Went to go get one of these today. Few hundred dollars, only a couple of hours. Much easier than most of the other tracks. Unfortunately Fuji isn't terribly motorcycle friendly, but I'll manage. A couple other guys I know go out there, so should be fun. Even on a 600. Though I think I might need a thousand soon, guys I ride with on the track these days have 1000s.
Too bad I'm slow on a 600. <sigh>