I've just posted this on the school hours/ childcare thread:
In my final year of teaching, between DH and I we were working 100+ hours per week. DS's TAs went on strike due to their salaries being slashed. Thank goodness my y13s had just finished their courses so I could pick up at DS's lunchtime on my gained time... teaching y10 and y9 with a 5yo was... erm... interesting... DH was abroad. His family are abroad. DM works full time 200 miles away. DGM is too frail to drive 50 miles to where we are. I didn't know any parents at the school gate because I didn't meet them when DS was the first in wrap-around in the morning and the last to be picked up each day. Without a support network it was just too bloody tough on top of a tough job, so all round it was better for family life to walk away from teaching and be a SAHM. That's obviously not a universal solution to other people! Where there is too little demand for childcare, it does not exist.
Basically my children, particularly DS1 were struggling for both of us working long hours with no support network. It turns out that DS has some specific learning difficulties and gets exhausted by school. Nearly 3 hours in a cramped, bustling after school club is exactly what he does not need. DH often works away sporadically and often at short notice. I ended up holding the mental load and taking the slack around his work demands on top of my already demanding job. It was not a healthy sustainable lifestyle.
If I looked outside teaching, finding something flexible enough with decent enough pay to cover two in childcare is easier said than done. I'd still have the mental load anyway.
If I had to, I could get my foot in the door for supply teaching within a few weeks. At that point, the benefits of work would outweigh the social costs.
I've been a SAHM to school age DCs for 3 years and I love it, and as a family we are happier for it. Admittedly I'm crap at housekeeping, but I got the brunt of it as I when working, I spent more time in the home than DH plus had the school holidays anyway.