Didn't you have another thread that was almost identical to this?

Bike Friday is a US brand that makes cargo bikes that are also relatively light. They don't fold, but can be disassembled or adjusted in the middle.
https://www.bikefriday.com/bicycles/...es__haul-a-day



There are, of course a number of other cargo bike brands.

Another option is to use a "normal" bike and a cargo trailer (or converted kid's trailer). Add a rack and panniers if you want for normal riding, then snag the trailer whenever you have something extra to pick up.

There are a lot of factors to go into your bike choice including your build, the kind of roads you'll be on. Hills. SALT and Sea Breeze, Whether you will be touring with the bike beyond your one destination to the Bahamas.

Why not get a new bike shipped to the Bahamas?