There is an inherent difficulty in getting people involved in something that has value only if people are involved in it. How do you start? Contingent contracts help, ie all participants sign something which says "I will pay for my share and move onboard if 99 other people also sign this contract". This approach is working for the Free State Project in its quest to get 20,000 libertarians to move to New Hampshire. In our case, however, there are difficulties. We think that its best to try out this new way of life with fewer people at first. Also it appears difficult to get enough interest for even contingent signatures on floating-cities without demonstrating viability. For these reasons, our plan includes a series of distinct stages, each involving a greater number of people.