Dont know if I missed it but what exactly is wrong? If I was told what was wrong with it by him saying only it was fubar, I would be like wtf is wrong then. With so many aftermarket parts and stock parts that can be picked up for so cheap its hard to believe the whole thing is screwed. Even if its something like the crank, a OEM trued and welded one can be had off ebay for $350. I learned this lesson the hardway but its better to work on your own stuff.
I bought 1k in new parts for my Banshee then paid a "mechanic" $470 for labor to have it blow up with no more than about 30-40 minutes of ride time. So now it sits blown in the garage until I can get more money for another top end and get it back together. I will be doing all the work this time myself. I've never done it myself but between common sense, a Clymer's manual and Bansheehq.com and planetsand.com what really could go wrong?