How would you handle this scenario?: You have an appointment for an estimate at a certain time. You drive across town to look at the job, arrive 15 minutes early, knock on the door (or ring bell) and no one answers. You call them to tell them you're standing on their front porch, and ask them to come to the door -- only to find out they're not even home (at the supermarket), and they ask you to wait there for about 15 minutes when will be home. The appointment is, after all, in 15 minutes from now. Would you stay there or just leave right away? I find it quite inconsiderate for them to be out running errands near the time of such an appointment.