Figured it would be expensive. I got my DB years ago for urban assault city road rides where I used to live, that would tear up a road bike. I rode up here a few times and even the easy stuff is rocky and brutal on the bike. Some of those bikes are insane expensive. My main riding buddy is also an expert downhill mtn bike racer, his race bike is over $4400!
Ever try a Versaclimber? The most intense cardio machine I've used, ever. Don't see many in gyms anymore. The last gym I was in that had one, it was always open, the manager said it was too rough for all but the serious members. I loved that thing.