We are looking at a solar seastead design that is a tensegrity design with 4 floats made
from duplex stainless steel.  

The living area above the water will be 16 feet by 40 feet.  So this provides a lot of shade below.

There are 4 floats that will be 20 feet long each, 4 foot diameter, and 1/4 inch thick.   
Each float goes out from one corner of the living area down into the water at 45 degrees.
Each float is held in place by buoyancy and 2 cables from the lower end of the float to
the 2 adjacent corners of the living area.
There is an extra cable in a loop around the bottom of the 4 floats (I think 
a rectangle about 44 feet wide and 68 feet long) so if one of the 2 primary cables for a 
float is lost the float is still held in position, so there is some redundancy. 

There will be two submersible mixers that each have 2.5 meter propellers
and electric motors that can get up to 40 RPM.  The seastead will move at up to around 
1 MPH relative to the water.   

I would like you to help me understand how this can work as a Fish Aggregating Device (FAD)
so that a family living on the seastead could have some easy fishing.

Normal FADs in Anguilla are anchored to the bottom of the ocean, so they don't move.
however, there are substantial currents going past them and the fish seem to handle
those.

It seems like with the shade, the 4 big float and all the cables in the water 
it has potential as a FAD, right?

The floats are duplex stainless steel, so we are thinking it may be ok to maybe let some amount 
of stuff grow on them.  Perhaps clean it every year.  Would this help to attract fish?

How long would it have to stay in one spot to start attracting enough fish that one
family could probably catch plenty of fish?

If they were moving through the water at 1 MPH and the propellers are at the back 
would many fish come along as it moved or would you expect basically all to flee the area?
Would it be much better at a slower speed, say 1/2 MPH?

We have some flexibility on the routes we take, are there things we can do to make FAD
aspect work better?  Like I think FADs are better in deep water?
Should we stay some distance from land as well?

I am planning to have underwater cameras on each of the 4 floats so the family can see
when there are big fish around and that it might be a good time to go fishing.

Probably some night lights aimed at the water could help?  
We have plenty of solar so this would be easy enough.

If we wanted to throw the scraps from yesterday's fish into the water as "chum" how
soon after that should be be fishing, right away?

I live in Anguilla in the Caribbean and the first seasteads we build will be here, so I
am more interested about how FADs in the Caribbean work than anywhere else.

Are there better times of day to do the FAD fishing?

I hope that it is very easy to quickly catch a nice fish.  I have gone FAD fishing with some people
and was amazed at how fast they got fish just by tossing a line in the water.  If the seastead
family just wants to catch one 5+ lbs fish per day, how long would you expect this takes?