With some new varieties you could be! and its excellent the mangos in your area will grow true to type this means you can collect the best tasting yielding and disease resistant mangos to form your grove!
Have you checked out @applenut . He is pioneering a bunch of apples being grown in the congo and has this excellent thread Congo Apple Orchard. I realize you guys have a different climate but he may have other growing ideas on how to protect plants like his bamboo fences and other tricks you could use.