Also... depending on how many children you are planning on teaching even in one week, you will have to consider how many schoolhorses you have; according to your plans it sounds like you will only have the one? If so, you are going to be very limited on your time, as the horse needs rest and days off. Just something to consider when you're planning out how many stalls you want to have.
Where is your tacking-up area? What is the footing going to be (especially important in tack-up area with children/beginners around)? Bedding?
All things to consider.