Free: Contests & Raffles.
While I've never rebuilt a boat as you've suggested, I've worked on crappy boats my whole life. Rebuilding your interior is going to cost more than you think and it may not be super worth it from a financial standpoint (you'll probably never get that money back out of it). If it were me, I'd clean up the inside enough to tolerate, get the motor running reliably, and use it until you're ready for an upgrade.14' is pretty small if you intend to take it on the salt. It wont be too long before you're having fun, but sometimes a little scared and your wife asks for an upgrade.Also, there's always another, larger, "free boat" available somewhere. Thats always the standing joke, there's no such thing as a free boat. Seems to be the inverse, the cheaper they are the more they tend to cost you in the long run.If its just a fun project, then power to you...
It appears to be a simple boat in fair condition and the engine looks like a fine old twin cylinder Evinrude 2 stroke, they are hard to kill. Check the compression 1st thing, you don’t want to waste too much time if the engine is toast.
I stripped down the guts of an older boat, stripped to the fiberglass for inspection. Then I just relayed in marine grey carpet throughout, used the 3M spray adhesive. Maybe cost $50-60 for everything. Don't need all the built in cubby' space and what .Then you have a blank canvas for seats, rod holders and storage. Of course, mine was geared more towards an open, clear area for fishing....