Porta poty or bolted in toilet you should go see what options there are in this area. Porta poty is like a fancy five gallon bucket they can smell worse than a Woodstock outhouse. Then theres the plethora of types of actual toilets with holding tanks running water and ways of pumping the waste out of the boat. Ranging from a hand or foot operate pump to ones you push a button.
And a real functional toilet that works without a lot of effort on my part was top of my list so I strongly recommend you figure out what you want here because in a lot of cases what you want here may literally dictate what boats you need to look at. We will spend long days on our boat we both decided we did not want anything at all like a porta poty.
Now after saying that, in all the years of boating ive done I cant actually state the cost that toilet added to my new boat purchase could ever be justified. However that new boat is parked in my driveway right now because it met the one criteria my wife wanted the most. Which is always part of a boat purchase the boss has to be the one who is happy with the boat purchase or one day youll be out there all by yourself enjoying the peace and quite of the ocean all by yourself while her lawyers drain your bank accounts to the point you have to drift in that boat because there ain’t no gas money for it to move on its own power
And my vote for ocean travel is 24 feet or more. But thats just my 2 cents worth.