I did a favor three years ago for a friend and helped him out on his a/c. He had some company come out and condemn it and said it would cost few thousand for a realitivity cheap system. He called me and asked for me to look at it and all I found was a older unit (12 year old Ruud at that time) witrh some rust on the coil and a bad contactor. I replaced the contactor and added a Kickstart to the unit and all I charged him was what it cost me for the parts.
I get a call tonight and it was him asking for hismoney back. It seems three years later the capacitor went bad again and he had to call someone else out to fix it and they charged him for the part and labor and service call and after hours call. I just had to laugh and say sorry but I eating dinner right now, call me when you come back to reality.