Be careful with hourly rates vs. "per job". My son learned this over the weekend. He has a landscape business and gave a estimate for moving stone and putting fabric under it, then moving the stone back. Once done, it was close to the hours he calculated and priced the fabric per square foot. Job ended up right where he expected. Well, the customer timed the worker. She timed how many minutes he was on his phone. And she counted how many rolls he used. They came back with all the data and demanded a line-by-line invoice minus the time the worker was on his phone. And wanted a "refund" for the "extra roll" on the ground that wasn't used (which was just an extra). This is why pricing "per job" is better than hourly or by materials and I try to do it as often as I can.