What people don't consider is, I imagine, you don't make much if any off of parts. You have to pay for your building, tools, other supplies, insurances and taxes with your hourly rate.
They get paid say 20 an hour to be an RN, their only expense to work is gas to get there.
It's easy for me to say, I wouldn't pay 50 dollars an hour for someone to wrench on my tractor. I wouldn't, but I am fully capable of doing my own repairs. If I didn't know anything about anything mechanical I probably wouldn't complain about 50 dollars an hour.
Exactly , they never factor in shop supplies like electric,gas,oil,taxes,ect. They think your pocketing the $50, Now that you are a legit business thats actually a really good rate! Shops get around $60-$80 here + parts
As for the low life's not much you can do this lawn and garden industry is a cut throat business these days.
I mainly sell parts but experience the same things you do with people copying me and setting the price a few dollars lower after I go through all the work explaining what the part fits they copy and paste my description.
Dont stoop to their level, keep your integrity and maintain your prices, once you build a reputation you will be set. one quote that has always stuck with me from a dealer is "A discount is soon forgotten, A good service is long remembered"