Unless I’ve missed it you haven’t said how old your children are and how far through you plan to send them. If they are primary and you’re planning on sending them all the way through to Uni, then you’re looking at making this choice for a decade? Perhaps more?
Only you can answer to whether you are prepared to stay in a job you find stressful for that long in order to send your children to private school. No one else on here can make that decision for you.
The other thing to factor in is what you would do in the event that you have a life event that makes paying private fees a challenge. I had one while my DC were mid way through private primary and despite it being incredibly hard (and stressful), I managed to keep them in as they had already suffered enough upheaval and I didn’t want to have them struggle with a school move on top of the events at home. That being said, it was really hard and it was a lot of pressure to carry. Everytime that term invoice hit I wanted to cry. And I often did.
When it came to transition from primary to secondary however, I made the decision to switch to state. Even though I could probably have continued to make sacrifices and stretch to it. I decided against it however as I didn’t want to sign up to another decade of extortionate school fees (and at secondary they really do ramp up, especially if your kids are sporty and go on sports tours etc).
I haven’t regretted my decision for a moment. My kids have settled in well. They transitioned across well. They understood why I couldn’t continue with the pressure of paying fees and that unlike many of their peers at primary, I simply didn’t have the wealth /family backing that those children had (a lot of private school fees are paid for by grandparents).
I am so much happier. I have freedom to balance my life, my needs and my happiness. I moved jobs in the past year and that was only doable because I wasn’t paying school fees. I left a job I hated, with a toxic environment to a smaller company with a phenomenal culture. I took a pay cut to do so.
This is your life. Only you can decide whether it is worth the sacrifice. For everyone person who comes on here and tells you they swear by private, you will get another saying they swear by state.
For me? I don’t regret moving mine out of private and I don’t at any level regret prioritising myself over and above private education for my DC.