I found the originals of the Little Fat Boat (LFB) on a Turkish website devoted to boat building and did my best to convert the plans to English. The LFB is cut from a single sheet of plywood - I used 1/8" Luaun - and weighs about 20 - 30 lbs. Construction is fast, and I spent a whopping $40 on this boat, and that cost includes $20 for a gallon of varnish. I do admit I used some scrap wood for reinforcement, so your costs could be higher.