Hi, I have an 85 Four Winns Santara 235 and the "cradle" that holds the gas tank is rotted as well as other sections of the deck. How long do you think it would take a skilled person (not me) to: rebuild cradle, re-install gas tank, and lay a new floor over the old with proper bracing and attachment? Anybody have experience with Okoume marine plywood? Thanks, sorry if too vague, but my boatyard quoted me MANY MANY hours to do this and I'm trying to get some ballpark hours. Larry