I'm new to the Forum and BMWs (I've been a Corvette guy and I've got a few friends with older 911s), we've all done a fair bit of work on our cars ourselves (up to and inlcuding things like frame-off restorations) and can handle most engine work from a technical perspective. The reason I'm posting is, we've got an opportunity to purchase a 2002 M5 for between US$10K-$15K. Its is visually perfect, and has about 8000 miles on it, but it was stolen and the motor is completely wasted.
I cringe to think about the cost of a replacement motor and trans from BMW, so I thought maybe someone here may have done a teardown/buildup of one of these cars and could give some pointers on relative difficulty (I.E, "Its like a 5.7L rebuild with more expensive parts" or "You're F-ed in the head"), expense, availability of parts from non-BMW sources, etc. Really, any information would be appreciated. Anyone who can recommend a private mechanic (or is one) anywhere in MD, PA, DE, or NJ would be appreciated as well.