This boat is easy to build using our downloadable boat plans. our boat plans are available for instant download so you can start building right away.. 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. Building your own boat with wharram designs is the easiest and most cost effective way to fulfil your sailing dreams. wharram self-build boat plans start from only £100..