Unless you are very lucky, I cant see you building a classic scooby from bare shell and being quids in.
Engine, gearbox, diff, £1500-£2000 most likely, maybe more.
Shell, £100-£500, maybe more
Not to mention things like the clutch, wheels, tyres, and all the other bits that may not be on the shell you buy. £800-£>>>>
You can pick up a decent scooby whole for about 3k,
Then there is the resale value of a q plate to consider.
Hope this helps.