I do give parents 5 days they can use for sick days without paying and 2 weeks in the summer they pay half fees for so the equivalent of one week but every caregiver is different. For the rest of the time it is payment by enrollment meaning if they have booked the space they pay for the day even if child doesn't attend.

On the part time question I charge an extra $5 per day for part time. If the days are set as in they book for only Mon, Tues, Wed. Then that is all they can use. You are free to advertise for another child needing the other days of the week. Space sharing actually earns you more money because of the higher per day rate but it does come with more settling in issues.