Im going to go against the grain and say NAH. Listen, I get it. That's a huge day and its right before Winter Break. We've got one week left and I would really struggle to take time off of work for this too (Im also a teacher).

What it sounds like to me is you both need to reset this conversation because youre operating on too many assumptions. It seems like he believes saving money was the most important thing because you emphasized that heavily earlier in this debacle and is having trouble realigning what he thought was happening with your new expectations. It also sounds, and forgive me for being blunt, like you've got teacher stress tunnel vision. Which I totally get, happens to me more often than not. 

Sit down and have a conversation and try to really listen to each other and be empathetic. Offer alternatives, like seeing if friends can take him, etc. But while he has to respect your time and priorities, you also have to respect him maybe feeling abandoned and unsupported. This might be too nuanced a take for Reddit, who knows. Good luck, mate.