I have 5 kids under 2 and find it quite manageable. Of course, we do have our moments of chaos, but for the most part, once the routine is down, things run quite smoothly. But routine, organization and an infinite amount of patience are key...which I'm sure you already possess being in this business in the first place. So far as the stroller goes, can't help you much there. When I realized I was going to be switching to mainly infants/toddlers, I immediately bought a 6 passenger stroller on Amazon. It was a bit of a financial bite but has been my life saver!!! Life is much, much easier now. However, if you wish to keep your triple, could the 12 mos be strapped to you in snugli, the 3.5 and 2 walking, the others in the stroller?