SDN actually has its own forum for Caribbean medical schools under the International Forums division.
The popular ones are St. George's University, Ross University, American University of the Caribbean, and Saba. There are many others, but if you're going to go the Carib route I'd suggest going for the more established schools (the less established ones often have licensure issues in multiple states).
There's a lot of info over in the Carib forum, so I'll move your thread there.
Not related to SDN, but also helpful is ValueMD.com -- SDN's Radiation Oncology moderator is a moderator there as well.