A small and biased comment from an outsider (I live in Europe, and sail a Tornado).

Why do you limit the width to 8.5 feet, on a 20 foot boat? I always tought the 2x1 formula for the relationship of lengthXwidth was believed to be ideal for a cat. You also exclude all Tornado's unless they shorten their beams, which I dont believe will happen.

Both tilt trailers and breakdown trailers works, if it's the trailering width you are concerned about.