Sorry, I am not sure what you are looking for.
This is all IME of course but if you are leaning towards reef, how expensive really depends on what you want to keep.
- Softies like leathers, paly, zooanthids, and polyps (and frogspawn for me are not too pricey to keep. My softie tank has a T5 fixture, a hydor koralia for flow, a HOB BakPak skimmer, and a HOB overflow box into a very basic sump with refugium and live rock rubble. It gets monthly water changes at best.
- My LPS tank was not to pricey to set up or keep. It also has a T5 fixture, HOB overflow box into a very basic sump with refugium and live rock rubble, and a hydor koralia for flow. The skimmer is in sump and is nothing fancy. Water changes? Whenever we feel bad about never doing it..... Granted there are no fish in there, only inverts.
- SPS. Holy crap, expensive!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Can someone doing it cheaper? Sure, but we failed miserably trying to do it cheaper. Tank controller, vertex protein skimmer, vortech pumps, filter socks, led fixture (had metal halide but got sick of it), dosing pumps, coral food, coral additives, weekly water changes, so many more tests.....