My own kids were 4 months and 18 months so what I was doing for them I was doing for the daycare which limited how far I was extended. My next two kids were born into the daycare so basically three of my kids have never known life any other way.

Be sure that you are not expending more energy than the minimum required as far as the daycare goes in the sense that age wise a lot of free play with a few extra centres of interest set up is all the group needs meaning you can take some rest periods to sit during the day since your school age kids won't allow that to happen in the evenings.