Make sure you make the mom aware that it isn't just about the care but that her "time" starts when you have to start dressing the little ones to go to the school and continues till the time the child leaves - ie more than the 1 1/2 hours. The entire time you are busy because of the school age child doing something related specifically to them is a factored into the charge so if it is a 20 minute walk to the school and it takes 20 minutes to dress the kids and get them into the stroller then that is 40 minutes plus the time to get there, back and care for child.

On the stroller - if it would seat all five I would be interested I will be back to three babies, a two year old and a 3 year old with very short legs and stamina.