Building a mold

[Steve W]

Casey,Kurt Hughes is a proponent of cylinder molded plywood construction and has used it as a way of building one off female molds to layup composite hulls in,it may be a better option than the plaster.If you want to build the hulls in composites you will be wanting him to give you a layup schedule anyway so id suggest talking to him about how well the cylinder molded plywood molds worked out.Good luck.
Steve.

[Landlubber]

Try making the boats in strip planking method, very fast, accurate, incredibly strong....I can see no reason not to do so for 3 boats. If you were to go into production, then yes make a mould, but strip planking in cedar is fast and easy. Epoxy sheathed to finish it all off.