It really depends on what your service is as to how to quote effectively. I do window cleaning and we price per pane but when I time the job for scheduling, I do it by the $/HR because I know what each of my employees can do on average. You can create buffers but keep them relatively small, no more than 30min per property. Your quoting style will help determine your efficiency, so you have to decide if onsite quoting helps you be more productive, or if customer pictures and online pictures are enough. The final best help is to train your employees to be cognisant of time, they can usually speed up if necessary.
