DUDE THINK POSITIVE ! even in the desert I make money sewing up sail’s....and dirt diving,,,,there are so many aspects for a revenue generating Self sustaining income..first off.. why rent? in the keys?
get an RV or travel trailer they abound there,get a po box/electric bill/lot rent(cheaper then an apt) for establishing residency. 2ndly, boat yard’s are everywhere..the best education on sailing and maintenance of various boats are learned over a beer and conversation with boat owners/liveaboards, for that matter, you could buy a boat cheap and live on it while working in the yard, EVERY boat yard has derelict’s, a little TLC and you will have a home and experience.
dive shops & charters are a waste of time and effort,most will screw you for the labor ! work for yourself ! there are contractors for moving boats either by sea or truck, from Fla to Maine.do you have a cap’t license ?
http://www.marinerslearningsystem.com/?gclid=CP3ukuGhnZwCFQ6jagodfnlSdA
cheap and online, will help with the insurance of you’r vessel as well as making money to move others !!
THINK OUTSIDE THE NORM & GOOD LUCK !