Hi,
In addition to KFdancer's heads up, there's also the factors of;
1. Relatively low pay in the teaching profession.
2. You'll both 'stick out' as different to the kids and also parents, which will most likely make you targets, positively hopefully in that you make a difference to kids thinking/lives, but 'most likely' negative.
In relation to the above, please research more and as much as you can from as many teachers as you can speak to or hopefully, as I don't know, if there's a forum online where teachers discuss aspects of their job. As a couple, spend as much time as you can evaluating this and if you feel that mentally it's something you feel you can both handle.
I've mentioned it a few times recently on this forum and recently, it's been the topic of conversation on LBC for the reasons there's alot of teachers leaving the profession. Plenty of teachers call in saying they're loving it and things are good for balance, but many also call in citing after a few years they have to jack it in due to the reasons above even though it's all they've wanted to do.
It's hard to say 'realistically' what your chances of finding a job is and perhaps where in the country too, but I'd say you have 'some' increased chances due to those leaving the profession. My mum's Bro's wife, recently retired from an East London School for girls where she was head of the English Dept. The stories she recalls, and things that happen - she firmly says she'd not recommend anyone young to go into the profession. A big part of the reason why is the government red tape and the fact that standards over the years have fallen for UK rankings because of that and other aspects too.
Cheers, DtM! West London & Slough UK!