If you buy it, then your stuck paying for the repairs, no matter how much they cost, $5k, $10k, $20k! may be more...do you have that kind of cash? And what do you have in the end. Most likely a lot of little problems that will continue to zap your cash.
Prolly better to put the $10k down on a good used one.
btw, imo, I wouldn't touch this.
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition