First, thanks for calling me out on some pretty strong hyperbole. I was trying to make a point and could have toned down my rhetoric. I do think, however, the security challenges would be at least as significant as for a large international city. We can debate about what specific threats should be addressed, but I think that list should go well beyond petty crime and muggings.
Second, my interest in joining this forum is primarily an intellectual attraction to a sovereign seastead (a SovStead?), however that might be created. I have little interest for an untethered and/or (semi) nomadic group of residents creating a floating island somewhere. I also see the complexity of developing the former as several orders of magnitude greater than the latter.
Back to the questions you posed: I think there are similarities and differences between a SovStead and a small nation. The difference, in the case of the Bahamas, is that it is already recognized as an independent state (country), is a party to many international treaties (e.g., Rio Treaty - 1947), has an established financial and legal system, and more.
I’m honestly struggling to think how a SovStead will find legal standing, how it will function in international trade, whether it could have its own currency and participate in SWIFT, etc. Would it have to pay “protection” to some benefactor?
At a deeper level, what would you change about the US or French constitutions, knowing what you know now? IMO, this is not simply about the technology.