I can personally assure you that when you spend that much on a tank, you care if the thousands of dollars in fish that just went in make it. Most clients, regardless of tank (or wallet) size, care about the fish if not just for the level of investment. The last meeting we took for a large 6 figure home reef was mostly consumed with filtration and building around it so the fish would be healthy, maybe 30 minutes on actual aesthetics and the other two hours plus was just on proper filtration and where and how we get the fish.
If you really want to see ATMs work in person after the fact just visit the SI Ferry Terminal and talk to the employees who were there when it was installed. Stocked to capacity on day 1 followed by days of removing dead fish. The filtration room is just pallet filtration from Aquatic Eco (cheap and easy) and a lot of it is broken.