on the first page I estimated the materials, and I don't see that changing.. hope this helps
"I have estimated that this project would cost about $30 US, as the materials can all be bought at such places as Hobby Lobby, Joann Fabrics and Michaels Crafts and your local hobby store. This is my thoughts on what materials would be required;
3@ ¼ inch plywood or MDF panels 12 x 24 for the ribs
3@ 3/16 inch basswood 3 x 24 sheets for the keel, frame and supports
2 or 3 sheets of 1/16 in basswood 3 x 36 sheets for the planking. The planks will be about ¼ inch wide, but some will have a nice curve and need more material."