I would simply sign a contract to cover this school year and then say you will reasess based on your openings, ages of children in care etc. That is a lot of income to waste on school aged kids as they not only take up a space they basically eat what you earn and use the rest on activities like crafts if you offer them so there is no money in them at all. There is enough time to advertise to fill your spaces for the Fall so a shame to give them now to earn basically nothing since you are wasting two spaces for 6 days a month. I feel for the parents but not fair to ask you for that.