If you are going to build a boat, you’ll want one worthy of your investment. read the reviews: best wooden kayak and stitch and glue kit.. This instructible will teach you how to build a 17 foot long greenland kayak that will weigh between 30 and 40 pounds and cost less than $300 in materials. compare…. Most of our sailboats can be cartopped, all of them sail beautifully, and all of them are easy to build..