I looking over prices of marine plywood in hopes of building a new boat. That said, I'm staggered by the numbers. While I'm picking a boat design that is very basic, not requiring a lot of pricey pieces in regards of materials, the overall cost is halting my plans to move on. I have Conrad Natzio's of the UK plans, things don't get much more basic although I don't envision building at a modest cost. Has anyone built using his plans before? Any suggestions on material substitutions?