I appreciate the craftsman and skilled tradesmen that come to my house when I am in need. To be honest, I am not the Mr. Fix-it type and almost never have been able to do-it-myself. My father told me long ago, sometimes you pay to have people do what they are good at. It will cost you more in mistakes and your own time in the long run.
As long as the estimates are honest, and the work is quality, I would never complain, and I would especially never "Not Pay".