Why not just plan for the baby to be due in the winter while your hubby is off and you can look after baby and run the daycare together ? Or just hire a helper to come in the mornings till the kids are down for nap. Then all you have to do is get them up from nap change diapers and give a snack and they go home. It would be the least disruptive for the kids and you probably wouldn't lose anybody. Good luck on your new baby adventure