Inland Waters catamaran all electric design questions

[Pablo4077]

I am designing an inland waters (Wisconson) 18' Catamaran powerd only buy 2 dc 20hp motors. this will be used primaraly for fishing and crusing around lakes. I wan't to build this design starting next spring and hopfully use some vacation time to finish it before summer is over.

I am only going to put a 2 person seat and stearing station in the center of the ship and 2 other seats for fishing(still to be desided on location).

My question is are their any DFX, dwg, or Images I can work off for free to help me design this boat? I found a couple of them on the net but they are model boats. Also I have Autocad 2002.

Any advice on design and matirials would be apretiated.