We are working on possible minimal viable product seastead designs.

This is a kind of spar buoy, but one designed to be able to move through the water.
So it will be sort of a fat wing shape instead of the usual round spar.
It is also designed so the main spar fits inside a 40 foot container so we can ship it.
The wing will go diagonally in the container, so it can be 10 feet chord and 5 feet thick
and the wing about 39 feet long.

In normal operation the bottom 70% of the spar will be under water.
Along the underwater part there will be 4 RIM-drive thrusters spaced out along each side near the thick part of the wing.
By using differential thrust we can turn the spar left and right.
Buy using more thrust higher or lower we can help reduce pitch.
Buy turning left and right with the waves, while much weight is down low, I think we can reduce the roll as well.

There will be 5 floors inside the spar for living space then above the spar will be an open platform with railing 20 feet by 20 feet
with solar above that extending out 30 feet by 30 feet, making sort of a shaded porch area for fishing or enjoying the view.
The bottom floor of the spar will have lots of batteries and other heavy stuff.  
The next floor up from the bottom will probably experience the lowest accelerations so can be for working or sleeping in heavy weather.



Please estimate the displacement.

If the spar and the porch are made of marine aluminum, please estimate the fabrication
cost of the aluminum in China.  The spar will be one piece.  The porch will be many pieces that are assembled on location.
Please estimate  the weight of the aluminum. 

Please estimate the total amount of solar.
Estimate if we are in the Caribbean the average kwh per day.
If we had batteries for 4 days of power, how many lbs would that be?
Assume the battiers, inverters, and other heavy things are on the bottom floor in the spare.
If we used that kwh/day evenly over 24 hours how many average available watts is that?

Does the displacement, weight of the aluminum, and battery weight of the batteries work out?
Will it be sort of stable?

If we have 8 RIM-drive thrusters that are efficient at our cruising speed, and used 60% of our "average available watts" 
for thrusters, how fast do you think this wing shaped spar buoy could move in MPH?

How effective do you think using thrust on higher and lower thrusters will be at reducing pitch in normal Caribbean waves?
How effective will turning to combate roll be in reducing roll?
How comfortable do you think it will be on the various levels in the spar and in the porch area in 3, 5, and 8 foot Caribbean waves?
Try to estimate G force at each level (assume we are trying to use thrusters to reduce roll and pitch).

Do you think this might work as an minimal viable seastead product?  Anything you think you would change?