I've only really scratched the surface of what it would take to move onto a boat full time, but my impression is that the vast majority of boat dwellers have a permanent slip in a harbor where they spend the majority of their time. Given that, depending on location Starlink might be practical sooner. (Although as a land dweller who owns some rural property I'd like to make better use of, I'm getting a little tired of living on Elon time.)