Last contractor I hired was a plumber, recommended by neighbors, to replace the underground water mains from the well to the barn, house, garden. Time & materials. Not a large project. He seemed attentive as we walked this simple project.
Then the contractor's employee arrived without the contractor, and without the materials needed. He said the single instruction he got was to "follow me around and do what I said".
I asked where is the DitchWitch I thought had been agreed on, he said he was told to dig the ditches by hand. We got an hour into digging and gave up. The route was all tree roots and I couldn't get my backhoe into most of where the trenching was needed. I went and rented the DitchWitch and we did within the 4-hour rental, what could have taken him days by hand.
He told me he was being paid $25/hour. While the contractor, who I thought would plan and lead the project, was charging me $75/hour for this guy.
I don't expect to use that contractor again.