Get a 30 gallon glass tank. An emperor 280 power filter. 1 daytime bulb, 1 blue kind, with 2 sets of fixature and ballast and hood for your light. A hydrometer, A Ebo-Jager heater 75 watts, a box of activated charcoal, a box of Bio Chem Stars, a net, and a bag of salt. If you want to start your tank with tap water then get Kordon's amquel and detoxer, but its better to use distilled/deioned drinking water from the beginning. If the Ph is too low then get a pack of Ph booster thingey. Cut the Bio chem stars in half, like a bagel, so they can fit into emperor 280's media basket, or get small bio media. Whole set up above will cost about $250, depending where you shop at. AFTER the nitrate cycle is completed and de-nitrating bio bacteria has grown on the bio media, you might want to add some high quality cured lived rock.
30 gallon glass tank - $30
Emperor 280 filter - $40
Daytime flourescent bulb - $20
Blue coral bulb - $15
Fixature, ballast, hood - $40
Hydrometer - $10
Ebo Jager heater - $25
Sea salt - $20
Bio media - $10
Charcoal, net - $10
Extras - $10
Tank Stand - $40 or build one!