OTOH, we had a wet bath in our boat and loved it. We had a good size vanity with storage underneath. We did have a large shower curtain that was on a ceiling track that completely wrapped around the open area including the toilet. Kept the walls dry and also the vanity area. A hand held shower. Obviously a floor drain. We used it every weekend + any company we had onboard and had no problems. My thought now is that the wet baths are getting so small that there is no room for anything else, but if you're going to be building from the frame up, you could certainly design something maybe using a ready made 60" shower base, panels for the walls, the shower curtain you'd likely have to make to have it large enough, and then a vanity area. We also had a window in there so moisture was not a problem. Something to think about.