As advised from the good people here i was going to do a small 12g salty and was advised to go bigger and i did. i got a 40hex stretch i spend just under 300 for everything. i bought 90% from craigslist, oceanic 40g hex tank, light stand rio 1100 powerhead, thermometer. $100.. then i bought a red sea prisim pro deluxe protein skimmer for $25 and the guy gave me 30lbs of base rock. aslo i got a testing kit with the 40 hex. then i bought my live rock online it was $75 bucks.. RO/DI water .50 a gallon from LFS and chems and red sea salt mix ended up being like $60. so im just under 300 for everything and im happy.