What type of boat is it? I would say the #1 thing to have is a water maker although I do realize they can be persnickety and you might not want to have to deal with the teaching and maintenance of it. Also, depending on type of boat, comfy bean bag chairs or something similar for on deck or a cool floaty that you can tie behind the boat.
I'd love custom cushions, I'm just not sure how feasible that is, but we'll have to look at it. Given that we're trying to sell it, that could make it more attractive for sale as well.
