I had one family once enquire about flex care. I ended up not choosing them just because I found better fit families but the idea suggested for fees was interesting to me. Basicaly we calculated that the child was attending daycare 50% of the time depending on the mom's schedule. ( So the child could attend 2 to 4 days a week ) So we worked out a monthly flat rate for 50% of full time fees regardless of paid vacation time or if the child attended or not half the week. So if I was closed for vacation the fees were the same, if they did not attend daycare for X reason the fees were ALWAYS the same no matter what. The parents were still providing the schedule one month or 2 weeks in advance so I could prepare meals and activities. I think this part could have worked out well for me. I just prefered going with a family that had a child in the age group I was looking for. So I can not tell you if it worked out well but I think this could be a feasible arrangemens if you ALL agree on a flat rate and everyone understands what you expect form them and vice-versa.