Actually, you're maybe too far south at Coolangatta!

Per day dive costs in Australia on a day trip are about $40US 2-tank dive.

A live-aboard can be as much as $150-200 per day US, as it's food, lodging, equipment, tanks, air, divemasters, etc.

I've actually not done a live-aboard, but would love to hear other's experiences too!

Gail in Eugene