For that kind of money the extra parts and F/B block & crank may be worth close to the total asking price alone. The few odd and ends, glass and windshield seem to be some of the major hurdles to finish.
I would put the paint on hold, get it running and address the assembly first. Then, after it's sorted put a vinyl wrap to make it more presentable.
If I had the space....5k is a bargain.