Time management, organisation and routine are the key for me

I have four horses and three children ( with number four due in four weeks) I don't find it difficult to manage, the fact your friends with kids are non-horsey speaks volumes
If you want something enough you will find ways to manage, over the winter months I would go to the yard after the school run and muck out, do the nursery run and go back to the yard with the youngest asleep in the car, sometimes I could ride in the school lunge or put one in the horse walker, then bring in,feed and back for the school/nursery pick-up.
It is quite a hectic life and I never stop, so not for the faint hearted but I wouldn't change my children or my horses
It also helps that I have a fantastic husband who supports me 100% and gives me plenty of time for me to spend with my horses, as well as never complaining about the ever spiralling costs