Specmar inc (previously specialty marine contractors) is an aluminum boat design, lofting, and kt company. we have a large product line including aluminum drift boats. Why build an aluminum boat? for things that go bump in the night. for ease of construction. for longevity. for good resale value. for the benefit of being able 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.