When you go into a Pep Boys or other big auto mechanic, it is easy to see that you have a tech or two working on your car, a mechanic above them, a manager above him, a supervisor above him, office staff, cashier, janitor, maintenance, a big building and parking lot, hundreds of thousands in lifts, tools, and computers, lots and lots of overhead.
When you walk into someone's house and ask for $95 per hour to throw a switch on the wall and a light thingie on the ceiling, you are putting $3 of gas in your truck and the other $92 into your pocket, or so they think.