Heres a list of all the stuff you'll need and general pricing (don't use this as exact I'm gonig off my tank)
Tank,stand, & canopy-800$ (drilled with built in overflow. two holes in the over flow "in& out" 2 in the tank for out)
Sump/fuge-200 or maybe more on how elaborate you make it
A decent skimmer-150-200
I would go with at least 80-90lbs of rock which could be like 400$ or you can find it less online
LS-100$
Some people use UV and swear by them, some don't, I use one and my water is perfect-300$
MH lights- I would say put aside 700 and you might be able to find them cheaper
a QT, many people don't use them, I don't because my LFS does it and I've never seen a sick fish in that store-80$ (just a 20gal tank w/ some power heads and hiding places
Plumbing-I get ripped off but I would say like 100$
And WATER. Water may sound cheap but for the intial fill up of the tank it's pricey. I get IO premixed from my lfs at 85cents per gallon. It will cost like 80$ and you always want to have RO on hand. You can either buy an RO/DI unit or you can get the reverse osmosis water from your LFS.
Your tank will come to be like 3-3.5k. I spend 10-15$ a week on my tank for water, food and what not. It may be more for a reef because of the special needs of corals. It's not a cheap hobby, I'm a kid and it took me a lot of years to save up, so cool though. Almost forgot set some money aside for the fun stuff, FISH & CORALS. Depending on what you do fish can be pricey, from 20$-200$ Most will be like 30 though, corals and anemones will also vary. Good Luck and keep us posted on how everything turns out
Jimmy
Almost forgot this, when your looking for fish notice the reef safe ones, those are the only ones you can get or they'll eat your corals, also I think your getting a 4ft-5ft tank, this means tangs will out grow it as an adult. Some like the kole, tang will do well.