New 180 Gallon tank

I grew up with a 55 gallon tank with some live coral but mostly just fish, over the last few years I have been doing a small fresh water tank. I am looking to jump back in to a saltwater set up and run a 180 gal reef tank, doing research it seems like there are a few different options regarding needed equipment. Ballpark not including livestock, tank, stand or anything inside the tank strictly equipment what should I expect cost wise?

Thanks in advance to any answers