You could rent his home out so you could rent a house in town. Or you could find a job in town that would enable you to rent an apartment near the school you want her to go to. You need to e open with your husband about what's bothering you, since you don't seem to have taken your daughter's ways into account when you supported your husband's new plans. You might have to take off the mask (or camoflage)-personality you have developed to keep him as happy as he wants to be. but that might begin a transition to a new phase of your marriage that is more realistic, but unpredictable, than what you have lived in up to now.
How do you react to these thoughts?
I know it's a difficult choice for you all to make for your daughter's sake. The approach I'm suggesting requires an assertive attitude on your part. That does not meabn you're forcing him to go back to renting in town--that would be aggressive. It's an invitation to negotiation, in hope that you can all get enough of what you want. So you would explore ways for your husband to benefit from returning to a town house, by widening your perspectives to include more aspects of all three lives--such a WHO the country home would be rented to, or how else it might be used, what your husband does with his work-life, etc. Your goal is to seek a win/win/win outcome (for all 3 of you).