It's a good point that you need to cover your expenses and have a profitable business.
Some contractors have a minimum charge. Some have higher first hour rates. Some have a service charge or travel charge. If it involves troubleshooting, you can have a troubleshooting charge...whatever works for you to keep you in business.
If I called a plumber or HVAC guy and he came with a truck full of tools and parts, I'd expect to pay $200 minimum. From the stories I hear, plumbers in this area charge around $600 for a toilet installation and $400 for an exterior faucet replacement(each about an hour job).
Every few years I raise my rates. I lose a few clients and gain a few new ones. If you work for pennies, you only hurt yourself.
Like anyone, you want enough money to raise a family, pay for their education, healthcare, and save for retirement.
Dave
