America's new millionaire class: Plumbers and HVAC entrepreneurs

I’m noticing HVAC systems (installed) are about 3x the price they were 10 years ago.

And they is from the cheaper companies that don’t advertise on the radio!

General inflation, competent techs are retiring/nearing retiring age, and the fact that new units seem to be more complicated internally/harder to work on (i.e. expensive) are probably why.