http://outrig.org/outrig.org/OutRig.html

Here's some history for you, most of what you are talking about has already been designed/built over the years.

Dick Newick used to sell plans for a Trimaran's center hull, to which you added two Hobie 16 hulls, and used the H16 mast/sails for power. It had a small cabin you culd sleep in too.

I thought about building one a long time ago, I always thought the H16 hulls/rig were a bit -undersized- for heavy wind sailing, or light air power. I would like to use Nacra 18 or Hobie 18 hulls/rig.