I'm not claiming that my life choices would scale to be a viable option for the majority of the population but it doesn't have to scale to be an option for some

I'm not claiming that my life choices would scale to be a viable option for the majority of the population but it doesn't have to scale to be an option for some people who are already interested in that kind of lifestyle. It's not a society-scale solution to the housing crisis but it's definitely an option for people in the position I'm in personally. Also it's not necessarily correct to say you require land-based infrastructure; you can be somewhat independent from the shore for long periods on a sailing boat since people do ocean crossings all the time, you obviously don't need fuel for propulsion, you can generate electricity with various renewables like solar, wind, and the boat's motion through the water under sail, and your water supply comes from the sea via a reverse osmosis machine. Provided nothing breaks beyond your ability to repair it you're effectively limited only by what food you can carry.