The actual epxense can vary a lot on any system, there are lots of variables.
There are ways to save money.
Firstly try and get secondhand equipment, if you chose carefully and spend some time waiting for the right thing to come up you can save a tonne of money.
Secondly you can start off with a small amount of live rock, and a larger amount of baserock. Baserock isn't live but it is cheaper and given time the live rock will seed it and turn it into live rock.
Basically if your looking to save money it will take longer.
The most amount of effort will go on research, do lots of reading on cycling and water parameters (salinity, KH, ph, ammonia, nitrite, nitrate).
If you don't want corals then you can use any light you want.
I would recommend getting all your equipment first (powerheads, heater, skimmer, test kits including a hydrometer and salt). Then set the tank up with equipment, substrate and water. Then add baserock and live rock. Then wait 4 - 8 weeks for the cycle to complete.