Proven boat designs, and how-to information for boat building. boat plans are for beginners and have been built by thousands since 1953.. The following cost and time figures have been submitted by builders. if a year of build was provided, we have included that information, otherwise the date of. Tnt carports, garages, metal buildings, rv covers, boat covers, barns, do it yourself kits, portable buildings and other engineered tubular frame steel structures by.