also some people have pvc piping in there tank to support live rock so this is another route to go and won't have to worry about spending so much on LR. once you do this your light will be the biggest impact based on the route you pick (coral). also researching on this topic might also be good. remember some corals like dim light others moderate and some like bright. same thing goes with current on certain corals and some corals do better in some tanks than others. good starting off tank just don't get hooked and start adding everything and anything without research and give it time so add something and wait a couple of weeks before adding something(time to research on something new or newly aquried species). also don't buy every chemical people tell you some work better than other and have different affects on certain tanks. don't forget to test your tank on water parameters and what you are dosing for. so research research research
good luck and welcome.