I’ve been looking at another approach to try and reduce costs. The idea is to have a long hull, but with comparatively low freeboard, and sealed off, like a beachcat. Overall, a lot like the Tepukei.
I’d build an accomodation pod ontop of that, out of relatively cheap polyerathane foam and fiberglass, and mount that between the hulls. It has a well-protected opening to the leeward side.
The hull is 9 meters long with 60cm freeboard most of the way. The pod itself is 2.8m by 1.2m and 70cm high. It has a 65cm overhang to leeward, to provide a very sheltered seating position outside. One thing it definitely does need however, is the ability to walk to the ama, fore-and-aft of the accommodation pod, so that definitely needs to be changed. I also don’t quite know yet where/how to step the mast on such a design.
While the accommodations are much more minimalist, I think it does have clear advantages where insulation and moisture is concerned. With a cabin in the hull, water will always tend to seep down through the hatch, and condensation on the walls is a major issue. A well-insulated accommodation pod doesn’t suffer from these problems, and the boat as a whole is way easier to build and a fair bit cheaper. Going around the Baltic in that, seems pretty daunting, but maybe with a bit of work, this can actually be made into a viable concept! 🙂