That's the same size tank as my boat and I want a bigger tank lol.
I think that 225 is about right for that boat. Sure bigger power would be nice but that should do. My boat is a bit smaller than that rig but heavier built. I have a 225 Honda on the back and think it's just about perfect.
I called th fellow who owns the boat. It was used as a guide boat since new 2004. Basic electonics Lowrnce sounder , propane heater. Older kicker many miles , still running well. The main is a 2007 Suzuki 225 "with about 1200 hours". Could be a good ride for someone . I would spend a little bit of money having the main checked out. The trailer rolls and that is about it.