I have to say that I am a bit surprised by responses in this thread. Based on the purchase price, the vehicle can be parted out with minimal financial loss.
From a project perspective, a perfectly running 100% trouble free vehicle (even BMW struggles with that at times) may not be the end goal. Personally, I get alot of pleasure out of learning how and why something works. If Katana enjoys digging into the details and solving each puzzle, I could see how it could be quite enjoyable.
If in the end, he has a properly running vehicle, he will have had some fun and potentially realize a profit. If it fails, he may lose a few dollars. Either way, he still learned alot about how to troulbe shoot his vehicles. He got out of his wife's hair for a few hours and maybe enjoyed a beer or two while kicking around solutions with other enthusiasts.
I am interested in the results. I wish I was more savvy in BMW, I would offer to help.