Take something like this, at 1/10th the scale, or even smaller, maybe 134ft high?
Put in a central residence and dinning room/lounge on the main level, residence above that. and a hydroponics greenhouse on the roof and on maybe 1/2-2/3 of the outer spars, with cabins spaced apart by them. Something properly designed around the Jellyfish Barge concept, that is actually capable of providing enough food to meet the demand, and desalinated water for typical consumption.
Use Biogas digesters to treat waste and make fertilizer for the hydroponics
Fish pen is a semi-closed habitat, much like canned hunts are, these days. Kelp bed, various fish at various levels of the food chain, floating oyster and abalone beds, etc.
“Catch of the Day” being the main meal, provided by spear-fishing, paying guests, prepared by the resident seasteaders/owners and possibly some staff.
Run it as an exotic B&B destination. Snorkeling, S.C.U.B.A. diving, glass-bottom paddle-boats, etc.
Say it has 6 suites, at up to 4 people per suite and prime reservation is equivalent to a spearfishing trip, elsewhere. Just no sharks to worry about…
Put it somewhere like the Pacific Northwest, say, Northern California to Seattle, away from typhoon activity. Folks provide their own transportation to and from, just like other get-away-destination, only maybe they sail out in a yacht, or power out in a cigarette-boat, whatever. Local fishing guides for deep-sea angling available, that sort of thing.
Goal: A profitable business, and permanent residence on the sea, with all the typical bed-and-breakfast accommodations and amenities. Maybe sea-taxi service so someone can hit the mall, or whatever.
Secondary goal: generate the infrastructure to build the main components. Once the spar-buoy is modular, and available for other applications, you now have a develop-able, salable platform technique. Slight restructure and make a heli-pad, or a domed hydroponics/aquaponics farm, that could also have an indoor park atmosphere (Moody Gardens?)
Hell, put out a family business to get someone ON the sea, regardless of the EEZ, or anything political. SHOW that it CAN be done. Maybe Mom and Pop are under contract to own it, after the corporation runs it for 10-20 years, with reasonable pay, so they have a vested interest in staying and maintaining a hospitable atmosphere. They have the option of filling vacancies with family and friends, especially in off-season.