The requirement a lot of pilots have is that they must jump and run in short notice and that kinda screws alot of possibilities. During flight training I made good money fixing windshield chips on cars. Before I found these pilot forums, I was learning from those forums. You can be on the way to the airport PDQ given 30 minute notice.
People expect to pay $35 for a decent repair and insurance companies will sometimes pay $70. It usually only takes 30 minute to complete a job and the equipment pays for itself quickly.