First of all get ALL your kids on the same sleep schedule - down to one nap. I don't do two naps here, never have and have taken kids as young as 11 months. I recently had 1 boy who napped mornings at home but he quickly transitioned here. I think mom still naps him at home 2x on weekends.

Work around the times you need to. If you have to leave the house at 3 then nap from 12:30 - 2:30 and get ALL kids on that schedule. I have never let a heavy napper sleep longer than our allotted time. I have a schedule to keep and its time to get up.