I recently priced one of the 18-quart Waeco condenser freezers at under $400. It draws minimal power. I plan to buy it soon. Of course what ever boat you purchase
may have a working fridge.
I've sailed a couple 26-footers on a tighter budget
which included the Bahamas
. My cruises were no longer than 3 months but I don't think 8 would have fundamentally changed things. Keeping the systems simple really kept costs down for me. I even did half of one cruise
with no engine
after the inboard died and had no problems. A limited solar
bank ran the lights, radios and autopilot
(limited night use) with no problem. I would have needed to double the solar size (and increase the battery
bank) to run even the small fridge I mentioned above, if I had no motor charging
. You just need to crunch the amp hour numbers on that one. Personally, for 8 months, I'd make a fridge work instead of getting ice.