The RV market is going to be a hard nut to crack, especially if building a niche, quality trailer. If it isn't all about profit or about getting large production numbers, have at it. A few things to consider: most folks want all of the amenities-full showers, bunks, queen beds, plenty of AC and some bling like they have at home. A lot of folks want to pull their house with a smaller SUV so weight is getting real important as vehicles shrink in size. Everyone is a cheapskate. We want it all but are rarely willing to pay more for better quality.
One thing you've got going for you is that I assume your boats don't leak. If you can build an RV that doesn't leak and doesn't require big maintenance, you'll hit one out of the park.
