Space is available 50 weeks a year.

Tuition is also expected 50 weeks a year, regardless of what a parent does for a living.
Parents who have seasonal positions can either pay the fee (and attend or don't attend) or they can pull their child and risk losing the space.

I let parents worry about their own situations and I worry about mine. My rules either work for a family or they don't. Either way, it's a personal decision for each family.