Squidly-Diddly: this is the Modular concept.

the hull is just a cat-hull which I widened to 8'(still trailerable, containable) for demonstration purposes. Note that it is mounted slightly off-center and somewhat ahead of the 2 cat hulls to demonstrate the flexibility of the concept. Mix and match as needed. Not all hulls would need to have motors, and could be special purpose(living quarters, water/fuel/blackwater storage, repair shop, cargo). of course the plywood deck panels could be easily removed as needed. this is not a lightly loaded cat design, or at least it has the ability for fairly heavy displacement if needed.