Thinking about building a BIG foamie, maybe...

We love Conch Fritter (CF) and have no thoughts of selling it, but for at least a year now I've been thinking about going to a kind of extreme and building a big, very aerodynamic foamie. CF is a hybrid, being probably 70% foam and the rest either spruce framing or thin ply or thin cedar. That is except for the floor, which I really overbuild, like way overbuilt.
So the idea is to build something with interior dimensions like 6+ feet wide, 6+ feet tall and 14 feet long. Doing it primarily in 2" xps foam, with only minimal framing. Thinking of a shape similar to Michael's Astroliner. I'm wondering if I can get away with using PMF on both the outer and inner skins for strength, but using wood (or maybe aluminum) structure points. Idea is to have a queen bed in the rear, dinette in the front, small interior head/shower and somehow doing a galley that can be used inside or out. I want the entire thing to come out below 2,000 lbs. hopefully below 1,800, and maybe below 1,500# including trailer frame. Won't be using a HF frame, but might use a modified aluminum boat trailer frame. Looking at maybe building something that can be comfortably used for a multi-month trip. Yes, CF can do that already, but the idea of a big foamie has just been lurking there for awhile.
Oh, and haven't even considered bringing this idea up to dear wife yet.
dave
So the idea is to build something with interior dimensions like 6+ feet wide, 6+ feet tall and 14 feet long. Doing it primarily in 2" xps foam, with only minimal framing. Thinking of a shape similar to Michael's Astroliner. I'm wondering if I can get away with using PMF on both the outer and inner skins for strength, but using wood (or maybe aluminum) structure points. Idea is to have a queen bed in the rear, dinette in the front, small interior head/shower and somehow doing a galley that can be used inside or out. I want the entire thing to come out below 2,000 lbs. hopefully below 1,800, and maybe below 1,500# including trailer frame. Won't be using a HF frame, but might use a modified aluminum boat trailer frame. Looking at maybe building something that can be comfortably used for a multi-month trip. Yes, CF can do that already, but the idea of a big foamie has just been lurking there for awhile.
Oh, and haven't even considered bringing this idea up to dear wife yet.
dave
