Craigslist is the place to go really. We got our 150 saltwater in bits and pieces of CL. $100 for tank and stand, $100 for rock sand and some misc fish and corals. $300 for a $1000 light fixture...ect. Just look around...sometimes your local fish stores will have ads in their stores for people trying to get rid of stuff at bargain prices. Be creative and you can get it done relatively inexpensively.