Wipe your finger in the exhaust pipe to check the formation of soot. Very dark deposits in the tailpipe indicate an front window repair incomplete combustion due to too rich a fuel mixture. Also check for black deposits near the exhaust on the bumper, body and tail lights. This indicates an above average oil consumption.
You're also competing against the big boys out there... The safelite's and other big companies who seem to have an unlimited advertising budget. Some getting into this industry become intimidated by the big boys and their big advertising budgets. But you don't have to be concerned about that if you market your business correctly.
Why do you think there is windshield repair? You got it, cost. Some insurance companies want you to repair rather than replace because of cost. They save a fortune if you repair your windshield. Also, you need to check with your state as to what is legal as far as windshield repair all states have different laws regarding this issue.
It will save you money in a way that instead of hiring someone to repair your windshield, you will be able to do it yourself. Or, changing your windshield will cost you more money because you will pay for installation and repairman. It's a great feeling that you could tell the world that "I can fix auto glass repair my own windshield". The question will be does it really work?
Clean up the front yard. Mow the grass. In the winter, shovel the driveway and the sidewalk. In the summer, add some flower pots. Wash the windows and window screens. Repaint the front steps.
Sometimes the weather stripping or window channel is torn and falling apart. This can jam the window or prevent it from moving the way it should. Also look for objects that might be jammed into the window path. There may be too much friction between the glass and the channel. You can lubricate the channel with silicone spray.
Windshield repair or replacement is totally depending upon the size and location of the damage and cracks. So, before going for any of these options just consult a glass specialist who can examine your shield and suggest if a repair will work or not. If damage from an accident is quite big then do not compromise your life, as you know better that windshield replacement is a necessity. Just bear in mind that your life is more valuable than anything else.