Lars,
In response to your question... "is the market ready for big powercats?"
I met with John Winter, the builder of the 86' Pacific Harmony Catamaran at the Ft. Lauderdale Boat Show. Pacific Harmony has MANY outstanding performance characteristics, i.e., low fuel consumption, low wake signature, excellent stability at rest or underway, etc. Basically, all of the things we've come to know about catamarans.
He raised the same question during our meeting. Is the market ready for this type of vessel? Unfortunately, yachting is a somewhat traditional sport, but it's not immune to change. Witness the proliferation of catamaran based center console sportfish boats. A whole new segment of the industry has flourished.
While John has not yet sold the original Pacific Harmony, he remains confident there is a market for them, possibly on a smaller scale for now, therefore they are moving forward with the development of a 50-55 foot trawler with a catamaran hull. It makes good sense. The trawler market in this range is quite strong. But as we know, the full displacement hull presents certain limitations. The cat hull could very well permeate this market, IF... interior volume can match that of their monohull counterparts.
I've toured Pacific Harmony and watched video segments of its performance, which is impressive. It's very fast and requires very little horsepower. It does however, have one notable drawback... the engine rooms in each sponson leaves very limited room for maintenance or repair.
Pacific Harmony has certainly proven that a catamaran can be as aesthetically pleasing as any monohull counterpart (much like your design above!). I really think part of the problem has been the lack of attractive styling in previous (and current) catamaran launches or model lines.
With your design talent... you could turn a barge into a luxury yacht!
But... can you overcome the limitations of interior space with the cat hull on a smaller scale?