Buying a Berthed Boat? Good idea??

[robm3]

Looked at a cheap Four Winns 230 on Thursday on consignment, all looked good and price was low but boat has been on a mooring for five years.
What I'd like to know is can the hull and stern drive (Mercruiser Bravo 3) be restored to look new as I'll have the boat on a trailer?
Two main things I guess:
Can the anti foul be removed from the hull leaving just the gelcoat? (can a high-power jet wash achieve this?)
Can the stern drive be sanded back and repainted?

Everything else is good and the boat is around $10k (£7k) under Market price so plenty of cash in the war chest.

Thanks in advance...

[robm3]

Oh, the boat dealer was the biggest b@llstter I'd ever met, some gems were:
"the boat lives in a dry dock" - barnacles on the hull say no.

"it's recently serviced" -open the engine hatch (he didn't know how to) to see 09/10 written on the oil filter.

Points to the mercruiser standard double clamping on the inlet houses and said "see how well it's been serviced, it's not even double clamped from the factory but is now"

When I could get the water pump working he said it was because the voltage was low (despite it being able to turn over the motor).

This guy was a major knob but the boat is basically sound so I just played along...