Join the Facebook group 'Life After Teaching - Exit the Classroom and Thrive' - it's such an amazing resource filled with people who have already made the move out of the classroom and who give such helpful, practical advice on job-hunting, managing finances and so on.
Pinned to the top of the page is the 'pit pony' video. Watch this. In it, the women who started the group explain how fear of not being able to match a teaching salary is what keep so many people trapped in the profession, but actually, if you break down what you need to survive to a daily amount, and work on the basis of 'how do I make £80 per day' rather than 'how do I make £1000 per month', you open yourself up to loads of new possibilities. You have to shift your mindset - you don't need a job to replace the job you have, you need income streams to get you to £80 per day. So that might be a couple of shifts in Tesco, three hours of tutoring, dog walking twice a week, a shift on reception in the local hospital - whatever you need to do to cobble the money together that you need.
This mindshift towards income streams rather than a job enables you to make the leap without worrying about having to wait until you find a like for like job. Once you've made the leap and are out of the classroom and the day to day stress, you'll then have the headspace to make a longer term plan, to find better or more fulfilling work - if that's what you want - and work out what the future looks like for you.
I left teaching two years ago. I miss elements of it - the children, the creativity, the feeling I was doing something special and worthwhile every day - but I don't miss the stress, the pressure, the all consuming nature of it, and the hours and hours of additional work. I now work in education in an arts organisation and while it's not as fulfilling as teaching, and nor am I earning as much, it has a lot of the elements of teaching I enjoyed without the stress and long hours. I love being able to work from home when I like, the flexible hours, having charge of my own schedule for the day, and so on. I also love going home and not thinking about work at all until the next day.
It took me a while to find another job as I left without anything to go to, but I plugged the gap with tutoring. I'm an English teacher so I was always in demand as a tutor - I charged between £75- £100 per hour and could make a living via tutoring alone, but I don't enjoy it that much - it's a bit too solitary for me.
Good luck - you can do it!