Imagine I have a solar and kite powered seastead that can move relative to the water at one of the following (they do not add together):
   1) 3 MPH on kite power when moving within 30 degrees of downwind
   2) 2 MPH for 6 hours a day on solar when sun is high
   3) 1 MPH on solar/battery for other 18 hours a day


Using wind and currents (even eddy currents) as best we could please estimate the travel
time for this seastead to circumnavigate the Earth.  So we want a path as much downwind and downcurrent as possible.   
The route does need to avoid hurricanes/cyclones/typhoons but other than that you can assume this seastead
is not too afraid of storms.  Do not try to estimate time it would stop for provisioning, repair, 
site seeing, etc,  just imagine it keeps moving unless it needs to wait till a hurricane season passes.

Assume we have Starlink and so access to up to date forecasts for eddy currents, wind, current, etc the whole trip
and can optimize the route along the way.

Also, lets assume that for the first circumnavigation we do not want to spend too much time in the
Roaring Forties and Furious Fifties.  We hope to have waves generally under 15 feet.