The way I see it, you could always sell me 45 pounds or so and that would only leave you about 255-355 pounds of LR left to sell! Sorry I got a kick out of it
Hmm making your own rock would be very nice if you had the time and patience, which many people do not. Why not toss your live rock in a bunch of 55 gallon trash cans with power heads right next the tank, fill tank up with some good water and then pull a piece out and put it in the tank? Or are you wanting to have all the rock placed BEFORE the water goes in? Just getting a better picture of the situation.