Do I want out of HVAC? Well, if I could retire with enough $$$ to do as I please... maybe. However I think I would miss it. I just like working with my hands. Maybe I could do some charity work, however the locations are usually worse than slumlord tenements.
I like running my own business; and HVAC is one I can run well. Will I ever retire? Probably not. I will just work less and less and less, and only for cherry-picked customers.
I did the flying gig also, albeit I did not make it to airline pilot. I did flight instruction and some small charter gigs for friends and referrals. I also have an A&P ticket (airplane mechanic), so I got to fiddle with lots of privately owned warbirds... lots of good stories there. (The most fun was going up in an F4U Corsair modified as a trainer (2 seater)... that thing is a cross between an over-powered sports can and a tank. I realized the sacrifices one would have to make their ENTIRE LIFE, along with living on peanuts, to be in aviation... just not something I wanted to do.
I have a few pilot customers... one used to be in the top 10 seniority at AirTran... until SouthWest bought them. He said he would quit in a minute except for the $$$.
I hate to say it; When Jimmy Carter deregulated airlines.... it started a long process of cheapening the business. Just one of those things.
Flying puddle-hoppers is still fun.