I'd also like a SW pond in my backyard with Clown fish and corals and SW angelfish, a hammerhead shark, a sea turtle, a blue dot stingray, a small octopus, an eel, a puffer, and a tidale pool at one edge with hermit crabs and starfishes and a sandy "beach" with sand crabs and seashells.
So... Corals, one shark, one turtle, one octo and the stuff they collectively refer to as food? That WOULD get expensive...
If we are talking a dream setup, I would also have a greenhouse saltwater pool, only with one side cut away and a huge sheet of heavy duty glass to look through. The poured concrete forming the walls would be all aragrocrete (allowed to sit for several months to stabilize pH) with live rock attached to the surface after the aragrocrete has cured. (About 10'x6'x5' with about 8' of the length viewable through the glass.) Established LPS colonies, with zoanthids along the upper reaches where the water might receed momentarily as a result of the waves created by alternating circuit massive pumps. Also, a few molded aragrocrete spires in the center for the softies that spread like weeds. Add mushrooms to the bottoms of the walls with a spire set aside for just ricordeas. One final pire would be set aside for keeping SPS. Probably a ton of live sand with 2-3 sandsifters such as the appropriate stars, many jawfish, gobies, and pistol shrimp. I'd also have screened off caverns full of rubble and chaetomorpha to act as refugiums, which have tubes to surface-level halide lights to keep everything happy. I'd have about a dozen mixed yellow and blue regal tangs (introduced quite young), half a dozen mated clown pairs (saddlebacks, onyx perculas, and maroons), two schools of chromis (different species), a few grammas, firefish (including a mated pair of helfrichi's), 2-3 dwarf angels, maybe a french or yellow crescent angel, and fairy wrasses. Plus, of course, a nice selection of crabs, snails, and lots of Lysmata genus shrimp, a few clams, and a very small number of stars and urchins. Banks of Halide lighting and actinics would be set up for when natural sunlight is insufficient.
Basically, a personal reef with nothing much eating my prettier fish and I can opt to swim around with them or not. What you might set up in a great wall aquarium but with swimming as an option. I am winning the lotto before setting this up, right?