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.