All the tools you need to disassemble the engine are right here:
$222 plus shipping really isn't that bad, and it wouldn't be hard to get most of your money back if you chose to sell them later. The Clymer manual mirrors the original book by BMW and tells you everything you need to know. http://www.amazon.com/Bmw-600Cc-Twin...rcycle+manuals
All you need are these tools, the book, a propane torch to heat the block and a mechanical aptitude and your on your way. Ive done a few of these engines, they're really much simpler than you think, you just have to know a few tricks.