Also a busy mama here. I switched to 4 day a week running when I started my
@DopeyBadger training plan. The only way I could get it in was to switch to AM runs. I have to be at work (40 minutes away) by 7:30, so adding runs to my morning was a big ask, but it was important to me. I've come to love them, because the weather is normally better (cooler, and our afternoon storms haven't rolled in yet), and because my kid normally sleeps through them so I'm not missing time with her.
My schedule is a lot like
@roxymama's, but I run T, Th, F, Sa.
@DopeyBadger scheduled me this way to help me achieve "cumulative fatigue," where because my legs aren't fresh for my long run, it simulates starting your long run at a higher mileage (say, 4 miles in) instead of starting from zero. My Tuesday run is usually an easy run, Thursday is hard, Friday is my slowest, and Saturday is long run.