Re: Boat Floor Repair
Yours will be extremely similar to most boats. A fiberglass shell (hull) was built in a form, and had a support system installed (stringers, sort of boat floor joists) that then got a fiberglass wrapped plywood deck (floor) installed over that. To this deck the super structure was applied: Cap (top part of the boat above the rubrail), consoles, seats & etc.
BVetter just got a good bit of the deck support (stringer) system installed and glassed:
1999 Celebrity 190 - Engine Mount and Stringer Repair
Check out his thread ^^^
Although they may look different, most boats are built similar to how WoodOnGlass' graphics suggest that they get rebuilt:
"Fabricating Decks, Stringers, and Transoms"
Bob's $2500 estimate doesn't include major upholstery or engine, steering lighting work. It's primarily hull, deck, stringers & transom work.
Don't discount the need to thoroughly inspect the transom if the deck (floor) is as soft as you describe. It's replacement will REQUIRE the engine & outdrive to be pulled.
Not a small amount of work ahead, unfortunately.
Again pix of your boat showing details of what concerns you & a few of it's overall general condition would prove HUGELY helpful. No matter how bad it seems, it can be rebuilt as good (or better) then it was originally, and most of the work can be done by you, if you have the time, energy, workspace, money & determination to do it. Access to a few typical woodworking tools will be helpful.