The only thing that is/was hard was adjusting to the lack of sleep as my losers girls have been sleeping through for 4.5 years and now I am up 2-3 times a night with bubs and I do have to get up in the morning to make the school run so that part is poo actually having to be out of the house early
I don't have 3, but this was my first thought with an older age gap, having to juggle a baby around school drop offs and pick ups. I can't imagine that would be easy. On the other hand, having the older ones out of the house for several hours a day would make things easier.... As others have said, I think each gap would have its pros and cons.