Whether you dream of spending time fly-fishing, snorkeling or just rekindling your passion for nature, this 12′ garvey flex boat offers you the opportunity to. Yes, with the right house boat plans, you can start building your own now yes, with house boat plans, you can build a houseboat. when it comes to planning building a. Proven boat designs, and how-to information for boat building. boat plans are for beginners and have been built by thousands since 1953..