Not going to be easy finding that big of a tank for that much. $600-$800 might land you a 240, but im sure you know that the wider/taller the tank is the thicker acrylic they need to use. Which in turn is going to drive up the price.
that tank is pretty cheap imo, if i lived in SF I would definately have picked it up cuz its acrylic and I just bought a new 360 glass(1/2" tempered all the way around and 3/4" tempered bottom) with a stand
for $2737. Didnt come with a 180 gallon sump or anything. Acrylic also lasts a lifetime, glass tanks need to be resiliconed after 15-20 years