I had a boat gel coated white only, a couple of years ago, for $100 a foot. That was with very little prep and only the outside of the boat. I know that it would be more now, and colors/schemes are going to cost even more. Save yourself the headache. Unless you are going to keep the boat for yourself. I will never go through that again. Nothing wrong with paint, IMO. My new boat is painted, and it looks better than a lot of gel coated boats, again IMO.