A well planned system is the best set up
figure out your budget
figure out what you plan to keep -fish-coral types
research everything before you buy anything, no need to spend money twice or worse.
buy the best you can afford
remember you can add more live rock later
you can"t add on to your skimmer
anything you can diy do it if you are confident it's done right
if you have a club near you - join
and ask many, many questions.
I have a 75 gal mixed reef
80 lbs of rock - mostly live rock but some was base rock
50 lbs of live sand
aquatinics 5 bulb T-5 (270 wts)
cpr overflow box going to a 20 gal refugium- mag 9.5 return
a koralia wavemaker 2 and 2x #3 pumps
I stock - two clowns, yellow tang, flame angel, decorator goby
various snails, 5x sexy shrimp
hairy mushrooms, rics- both Florida and yuma, a duncan, trumpet, zoo's and paly's monti caps and digi, xenia, one acro