Welcome Kimberly. My children definitely run me down too! And I only have 2. DD4 is really starting to run me ragged and hurt my brain in a way she wasn't a year ago. I don't have any additional advice - I like the childcare one! We are homeschooling DS7 this year, but DD4 is still going to a 3 morning a week play based preschool. If things go well, both will be home schooled the following year full time. We may want/need other stuff than that. I may get DS into some homeschool classes at a local art school, zoo, or science museum.
Hope to see you around more!