I would like to build a large sailboat someday; something seaworthy and comfortable enough for two to live on. How many man hours does it take to build a 60-75 foot sailing catamaran. what would the estimated cost be for raw materials. It would need to be fully outfitted and ready to man. I would not be building the entire boat–more like, I would be a general contractor, hiring craftsmen to work on different parts of the boat. I would plan on performing as much labor as would be reasonable considering my lack of experience and proper tools.