I have about 45% of my work "Commercial" - Shops, Doctors and Dentists Surgeries and offices. So I have split them into 2 hour slots for each day of the week ( can park in the town and be done before the Traffic Warden is about!!!!) Start at 7.00am finish 8.30 - 9.00 home for some breaky then out on houses by 10.00.
Mind you, if you have no commercail I don't see why you can't start at as early as 7.30. People with families are often up at that time and don't mind, besides they'll often throw the money at you as they fly out with the kids to school or to work, saves having to collect later or wait for them to send a cheque!
David