My suggestion would be to go for shacks near the beach. They are near the beach, cheap, and there isn't any restriction so no problem on the alcohol scene.
A budget of 7-9k should be fine, but it eventually depends on your standards. If you want to eat at expensive restaurants and live in a luxury resort, I suggest you carry a credit card.
If that isn't the case, carry 10k with yourself. Have a great vacation!