The world is your oyster... whatever you decide to do for your happiness and your health is paramount. Retiring in the Caribbean sounds like a great idea, I hope it happens at the right time when you want it to happen.
Wishing you good health and success in all your plans and endeavours.
Actually, now is the time to make the move!
Write the government, ask for a land donation on the ocean to develop new technology. There are some hurdles, but if you can prove certain income (as low as $1000US a month) they will give you citizenship and land they can no longer sell. At least for Canadians, anyway.