You've probably seen a bunch of "techs" like is around here, with their golden screwdrivers and gold plated Dosy meters. I wouldn't have an issue with that if they'd just stop yanking out limiters and telling people "hey, I tuned your radio and it's blowing smoke now". That's just deceptive and wrong... it's flat out lying.
And I own a Dosy meter myself. I also own an Aries triple meter thingie. But I also own a Coaxial Dynamics meter with Bird slugs, I've made sure to calibrate my POS meters by the CD. I have a service monitor too, it and the CD agree with other so I feel fairly good about my watt readings. I just mostly use the Aries to read average power and the Dosy is reading the peak watts, that's just so a customer can see what his mess is doing... for serious business I turn the service monitor on.
I use a 10,000 BTU propane infrared heater to heat my shop, with a thermostat. Next year I'll swap out the crappy AC I have now for one of those mini split systems. I guess a big tube amp would be cheaper than my gas bill... maybe I should look into that.