Over this time I have read threads, researched ideas, and I have finally gained the knowledge, the plan and the courage to start on my project.
The plan is to build a 10'x4'+ Grunman. Most of my reading and planning has been focused on making the unit as light as possible, but still be very comfortable and practical.
Over our COLD winter I plan on prebuilding the foam core walls, floor, bulkhead and cabinet frames, then in the spring assemble all the bits

Thanks to everyone who has posted all the excellent solutions, ideas and wisdom that has got me so energized to build this darn thing ... I think it is an addiction