A tin of canned chicken in the bahamas
is about $6, canned veggies also more expensive but not as drastically. Really good, cheap
"commonwealth cheese" and, of course, good cheap rum
Might also consider good quality dehydrated meals
, such as Mountain House camping meals
. Very easy to make underway and a good addition/alternative to canned goods. Some are actually quite good and less weight/space/trash. I have a stockpile of dry veggies that taste quite a bit better than canned and have a more vibrant color when rehydrated.
IME you can find fresh goods almost everywhere in the caribe if you seek it out, coupled with a nice stock of canned/dry goods for the lean times if you can't catch fish