Oh - just a thought about the LR. See if you can find a place to get some dead/"base" coral rock -- usually
much cheaper than LR - sometimes around $1.00/lb.
While you will still need some LR, you can usually do about 40% "live", and 60% "base"/dead -- the ugly dead white base rock will turn coraline encrusted and "live" in just a matter of a few months.
http://www.hirocks.com is one MO vendor that sells base rock.