I am exploring seastead designs.  I have an out of the water triangle living
space with 3 legs/floats/columns that are like 60% in the water and have very
large propeller submersible mixers and lots of solar on the living space can work.
It will move slowly, like 1 MPH, but is just solar powered and can go forever,
and is much more stable and lower price than conventional yachts of similar living space.
I am reasonably confident that there is at least some size niche market for such a design.

But now I want to brainstorm possible future competitive designs that the market
might like even better.

One possibility is a solar trawler with stabilizers that work at the slower speed
a solar trawler could achieve.   Imagine we have a 60 foot trawler that is 18 
feet wide at the widest but has the equivalent of 60 by 30 foot worth of solar
when all fold out solar is extended.  If we are operating in the Caribbean
and have batteries for 2 days worth of power how fast would you expect this could
average when going 24 hours a day?   
Normal fin stabilizers need like 6 knots or more and we won't be going 
that fast.  Please explain how big normal fin stabilizers are and how big
they would have to be to work at the speed this solar trawler would go
(don't just say "not feasible" but work through the calculations and tell me the size it would take).
If we made this solar trawler in China out of marine aluminum how 
much would this cost?

Similar to the solar trawler with stabilizers, now evaluate a solar trimaran with
stabilizers.  The amas would be angled so they were normally 5 feet above the water
and would really be a backup in case the stabilizers failed.  There would
be a stabilizer under each ama on a wing shaped beam going down into the water far
enough (perhaps 10 feet below the ama).  This would give the stabilizer wing
more leverage as it is further from the center of mass of the trimaran, so it
could be smaller.  How big would this one need to be?

To me a 50 foot catamaran is not really stable enough to work on a computer in
the Caribbean.  And longer than that that is really above the price range
I want for a seastead design.

Are there any other single family solar powered designs stable enough to 
work at a computer in the Caribbean that you think might be better than either the triangle
seastead or the solar trawler with stabilizers?   What would it be like?