We are working on a seastead design.
This is NOT a normal boat hull shape, but it is a bit like a trimaran in that their are 3 floats.



Above the water there will be a big triangle frame, 80 feet on a side.
The triangle frame will be a sort of truss structure that also doubles as a 4 foot high railing to keep humans from falling off.
We will call the 3 points on the triangle "front", "left", and "right".
And the edge between left and right we will call "back".

At the same height and in the same style as the triangle-frame/railing will be a frame to support a rectangular living
area.  The this living area frame will be 14 feet wide and as close to the front as it can be 14 feet wide
inside the triangle.  It will extend all the way to the "back".   

The living area will be 8 feet high, with the bottom on top of the rectangular frame above.  Lots of windows in the
font and back and some along the side.    

There will be 3 floats/legs/wings that will be the buoyancy.
Each leg/wing will 19 feet long and have a NACA foil shape with 10 foot chord and 4 foot width.
This makes for a "small waterline area" similar like a small oil platform but one that can move through the water easier because of the foil shape.
Each of the 3 legs will be attached to the underside of the big triangle near one of the 3 points and going down into the water.
The 3 wings will all be parallel with the blunt or "leading edge of the wing" forward  so it is easy for the seastead to move forward.
Each leg will be 50% under the water (so 0.5 * 19 feet) and the top 50% out of the water.
On front of each leg on the top half that is out of the water will be a built in ladder.

Connecting to the bottom of the railing frame will be a netting like on some catamarans.
In the middle of the long side of the living area on both the left and right there will be a door and steps going down to the netting (about 4 feet down).

There will be 6 RIM drive thrusters, one on each side of the legs/wings about 3 feet up from the bottom.
These will be aimed so they can push water past the wing and toward the back of the seastead.

There will be solar on the top of the living area and also on fold down panels on the left and right sides.
In the picture have the fold down panels up and level with the top of the living area.  
The living area is 8 feet high and the fold down panels go out 8 feet.

Centered on the netting to the left side of the living area will be a 14 foot RIB boat with 1 outboard motor.   
On the triangle frame next to the boat will be a davit/crane for loading and unloading the boat.


The above seastead design is reasonably stable in typical Caribbean waves.
But imagine we have someone who wants even less movement while he is working on a computer.
We will locate this special desk above the very center of the big triangle.
If we had a corner desk with shelves and a built in chair so the users view to the side of his computer is just this desk.
Look at some sort of passive stabilization for this desk (maybe some kind of springs and dampening)
and also some sort of active stabilization.
What sort of designs would you recommends?  
Estimate how well the passive and active designs would work and what each would cost.  
Then try to guess if these were options on the seastead what percentage of the customers would purchase either of them.