does your tank have a top? how many gallons is it? if your tank is topless, i wouldnt go for firefish..
zoanthids, mushrooms, xenia are some of the hardier corals.
you should join a local reef forum to your location. there are a bunch out there. you could probably score some free LS from a local hobbyist. where are you located? u can def buy rock from hobbyists as well. they usually sell rock at 2-4 bucks a pound.