Suggest you find someone looking for a caretaker for their yacht at the marina. Marinas generally have break rooms, with showers, TV ,wifi, and sometimes fitness centers. A buddy did this at Ala Wai for years.

Great way to enjoy the waterfront.
I did this for almost a year in a Chauffeur's quarters at a mansion in Ladue (St. Louis),,while the family was overseas. No waterfront though.