ALOT Too much for your average worker. We're planning for a 1,000 freshwater. My guesstimate was around many thousands and thousands of dollars for it all. We're already saving, and we still have about 5 to 8 yrs before we follow through w/ our plan. But, here u go, found this for u, they specialize in SW: http://www.seaquariums.com/index.html contact them and see what they say, I'm sure they'd love to answer ur questions.