Been there done that.
Had a 1991 32ft searay with twins back in 2000.
Cost me $10k a year to just have it sit in the marina, service, etc etc before I even put fuel in it.......
I even slipped it at Monty's, the cheapest slipping in Brisvegas and done the antifouling, leg servicing every year myself.
Expect to pay somewhere between 10 to 20k per year these days, especially if you are looking at 20 plus years old.
Don't get me wrong, we enjoyed it and had a great time in it for 2 years but the novelty soon wears off.
You'll never fish in anything over 20 plus knots regardless of the sizes your are talking.
Was a good learning curve. That's why I went back to a large trailer boat.
Still costs me about $5k a year in maintenance, trailer bearings brakes, roadworthy, servicing etc.
Plus the misses stays home which is an added bonus......Ooooops I actually said that out aloud

At the end of the day it boils down to personal preference and only you can make that decision.
Cheers Rob.