I know all too well.
If you think motorized bicycling is expensive, just go buy yourself a boat and you'll look at the bike budget a little differently. The bikes costs aren't even a bump on a mosquitos a$$ compared to a boat.
Use the boat for commercial fishing purposes and you've created yourself a losing proposition.
My grandfather was an oyster fisherman, and my dad had a shrimp boat he ran for a second income.
Something on a boat is always broke and needs replacing.
I broke tradition when I got older, and never attempted to earn from the sea. I prefer the rod n reels as a recreation only.