I don't want to spend the time or money washing, sanding and repainting
One of the things that are different between sailboats and computers are that on sailboats there are no "shortcuts".
In 1982 to 1987 we kept our C22 on Clear Lake during the summer months, May to September, in the water, in a slip. The rest of the year we trailered it back home to San Francisco and kept it on the trailer and sailed weekends off the trailer from a launching ramp.
Clear Lake had an usual rig: an underwater rotating brush service that was like a car wash. You drove your boat over it and the brushes cleaned the bottom. I'd never seen anything like it before or since. We did it at the end of each season.
We never put antifouling paint on the bottom as long as we owned the boat.
It got scummy for the four or five months in the lake. The bottom was pure white, and over the years got greener and greener as the dirt got into the gelcoat, but it was still pretty smooth after the underwater brushes did their work. Even after that, though, we spent hours cleaning the scum off the waterline with plastic brillo pads. It was NOT fun in 100 degree heat or September early cold storms.
We also had a swing keel which let us be almost the only sailboat to use the brush service; they did it for powerboats mostly.
That said, having the boat in all year most likely would not work and you probably don't have this unique service, and you may even have a fin keel.
You could dive on it every few months and brush off what grows, but some of it may be more than an underwater hand scrub could handle.
If you don't wanna spend the time or $ to do it right, you're gonna have to spend the effort somewhere down the line or else the price you will pay is a filthy bottom. For what will undoubtedly grow even in freshwater, you're gonna have a buildup that a simple power wash may not get off.
You don't want to spend time painting? You're gonna spend more time cleaning the scum off. Pay now or pay later.
That said, anything's feasible.
Your boat, your choice.
