Single Family Seastead
This page should be filled out with the arguments in favor of a Single Family Seastead (and maybe some against).
Some arguments at Vince Seasteading Views.
A single family seastead should take less capital to startup. These can be more stable than boats that many families travel around the world in. A SFS lets each family decide where they want to go, so dynamic geography works at a fine granularity. There is no need for new government structures at the start as each SFS can just get some country flag like any yacht.