Well, we have 33 tanks. And I want to go diving tomorrow, and everything we own is either empty, or has the wrong gas in it, or is the wrong size, weight or material of tank for the dive I'm contemplating. Clearly, more tanks are in order!
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You still need a compressor and bank bottles, a booster, many more tanks, at least one rebreather but probably several, and don't forget about the matching scooters for you and your buddy.
That takes care of about the next $50k or so. Let me know when you need the next list.