Depends on how bad the engine is. You'd have trouble parting it out and making any real money if you didn't spread it out over time. I would normally not give that much for a project bike unless I KNEW the engines situation. Seat, Radiator, Scoops, Swingarm, Diff, Side Covers, Fuel Tank, and misc won't pay you back with just those. Add in the electrical and someone needing them and it might make you a break even deal not counting the engine. Will take time. Forks, Wheels, ect...
I've given less for more but also given more for less lol.
Sean