I’m not an engineer but I do have thoughts on designs.

Most seastead concepts I’ve seen are some kind of futuristic city. I think liberty is better served by customizable, attachable / detachable crafts capable of supporting a small group like a family.

If you like a community, bring your home over. If things go south, you can head out.

Depending on your particular industries, slip in or create modules for farming, aquaculture, manufacturing, etc. keeping the option to specialize or generalize.