People spend a lot of money on booze, vacations, etc and don't think twice about it.
I bought my first pair of Von Schweikert speakers in 1997 from money I saved by giving up alcohol for 10 years (it was necessary).
People spend $50k on vehicles every day. No big deal. Why is buying a nice audio system viewed differently? You could buy a used vehicle for cheap and it would get you where need to go.