I'll weigh in here - I'm homeschooling my 5th grader and while I'm not currently doing daycare (I took a break this school year), I do have a 15 month old at home.
I have found that we get through our school work WAY WAY faster than they do at school. My son does Math, Reading, Journaling, and Social Studies every day, and Science and Typing practice on Tuesdays and Thursdays. We also do Reading Comprehension and Language Arts workbooks on alternating days. Friday is test and library day.
It sounds like a lot, right? Nope. We start around 8:30 and we're done by 11:30 or 12 every day, sometimes sooner!
We get the majority of our work done during the baby's nap time. Then we have the rest of the day to play and get stuff done.
I LOVE it.
It can definitely be done. I wish you the best of luck!