If you want my 2 cents, you should sit your daughter down and talk to her about the fact that money will be tight and that you and her mom will not be able to afford things that you once could.
After you have that conversation, I'd suggest you do one of two things:
1. If you CAN afford to pay for this, then just do - it's not the child's fault that her mom is leaving.
2. If you cannot, go drive for Ubber until you can come up with the money.
Me: 28 H: 30 T: 9 M: 7
WAH: First half of 2017. Round 2 started in Spring 2018.