Saltwater and Freshwater Tank Owners- Cost Estimate?

Hi all!

I'm looking to start my first fish tank and I'm not sure if I'm going to go with saltwater or freshwater. From what I hear, there is a lot more complicated science behind saltwater, and that makes it more expensive.

If you don't mind sharing, how much did it cost you for your current setup? I would love to get some estimates before I start planning more seriously.

Thanks!