If you wanted to go deep sea treasure hunting, what would you need and what is the total coast?

I know you would need the boat of course. I mean for the equipment, total price. How do you haul something up from 500ft to even a mile under the sea?? Im talking about some serious equipment. What is the total price to actually have good solid equipment to find what you want, cameras and all to actually... show more I know you would need the boat of course. I mean for the equipment, total price. How do you haul something up from 500ft to even a mile under the sea?? Im talking about some serious equipment. What is the total price to actually have good solid equipment to find what you want, cameras and all to actually bringing it up from under. Thanks!
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