I charge a service call fee to get to the site. Try and always price and get approval for the job prior to beginning the work, that way you are not disclosing an hourly rate, just a total cost. For trouble shooting, I charge a diagnostic fee - which covers up to 1/2 hour trouble shooting - then hourly after that. Once the problem is found - a price to repair.
You are correct in your thinking that you cannot do 1 -4 hour jobs profitability for $65.00 an hour.
You are correct in your thinking that you cannot do 1 -4 hour jobs profitability for $65.00 an hour.