Four (or more) times a day with exactly the right sized food (and nobody's certain what size that is or if it varies) with exactly the right nutritional content (again, nobody's sure), and probably twice-daily (or more) water changes to maintain the pristine water they need.
Even if you somehow get the formula exactly right, you are going to be spending a LOT of money on food, RO water, and salt, and we're talking quite a lot of time every day to keep this thing alive, and good luck ever finding a pet-sitter who can properly do this. Say goodbye to vacations and a big chunk of your daily free time.
Most books on saltwater tanks can't be trusted. By the time you can get a book published, there have been new discoveries, and most of those books are several years old already. I used to have a book that recommended under-gravel filters, fish-in cycling, little to no live rock, and once-monthly water changes for saltwater tanks. That book ended up being thrown away because most of it was pure nonsense.
It's comparable to reading a book on zookeeping that recommends those jail-cell-like cages for animals.
Which is really a shame- a good book on saltwater aquarium maintenance would be very helpful.