Gentry Custom Boats does a skin on frame version of J Henry Rushton's classic "Wee Lassie". 10'6" LOA and weighing in at only 19lbs. They sell the kits for $400, but also sell just the plans for $55. I am thinking about the plans at first and then ordering the kit if things look too complicated to piece-work.
They recommend skinning with a polyester fabric, but also have an option with clear vinyl skin so you have an invisible boat! (It's really cute, google images for it! All you see is a framework floating in the water.)