I'd buy that all day long at 2x the money.
Couple of points ..
1- Cuba .. definitely a saltwater boat. Is it a saltwater series? I'm guessing its rusted out and is going to need a new motor. $2700 + labor (or there abouts).
2 - the trailer looks ok, its galvanized (not SS) and I wouldn't do anything to it.
3 - Just priced all new skins for a Malibu and it was $2k. So $4k for an upholstery shop or just find skins and DIY. I would stick to white/grey/charcoal on the colors. Don't try to incorporate that blue. Keep it neutral but complimentary inside.
All depends on what you want to do. In the states, I would buy it, fix it, flip it. You don't exactly have a huge resale market (guessing).
Just a dirty penny .. keep rubbing! It will all be worth it in the end.