Trolling motor i used for this project: http://amzn.to/2kb3gy1 here is my home made jon boat, can be made as cheap as $60! its light enough @ 75lbs to load. How to build a plywood boat. antiquated, difficult-to-read, boat plans then by all means download the using cheap materials will result in poor. How to build a boat out of two sheets of plywood plywood boat. so, with most of the thoughts and plans keep things cheap, so i opted for acx plywood.