your system cannot be a plug and play. it simply isnt possible. there are possible systems that is automated but, you yourself have to be there to test, and do water changes.
as an example. you buy the top of the line stuff.
lighting with controller. apex elite for PH, TEMP, etc. skimmer( you have to mention you have to empty the collection cup). auto feeder, all these system can go bad at any time.
but wait, your coral isnt doing fine. you have to test your mag, ca, alk, nitrate, phosphate, etc.
theres many threads out there about this stuff. just search and you'll find your answer