Step by step instructions on how to build a wooden boat for fishing this video shows you how we built ours and it floats very well. the basic flat-bottomed. Plywood boat plans. if you are looking for a way to build an inexpensive boat you should definitely consider plywood boat plans. using plywood is one of the best ways. If you enjoy being on the water or you have a passion for boat building then homemade pontoon boats may be of interest to you..