I think there are more parents who require 10 hrs than not it seems at times. I turn most of my potentials away due to the fact that I am only open 7:30-5 and so many need a 7 drop off and/or 5:30 pick up or later. I don't mind because I have my own kids to run around so it's not like I can be flexible for a later pick up. Although 10.5-11 hours a day is long, if you are open for those times, I don't understand the problem. You will be open and caring for at least one other child during the earlier drop off and later pick up so it's not like they would make you open earlier and stay open later. Unless a child has separation anxiety I don't see how it would be to long a day for them, and quite honestly if they do, they would be a problem for a much shorter day but usually that's dealt with once transitioned in and is only for the first part of the morning or drop off. When I used to open till 5:30 it didn't change the temperament of the child at all. You say the 10.5 hours is your total opening hours so why wouldn't you allow parents to make use of the entire day? If you have 1 or 2 children then you may as well have all 5 of them. I find the more the merrier as they entertain each other and require less of my attention to entertain them. When is your first one dropped off and last one picked up each day?