I do realise not all school holidays are 'holidays' as such, but even sitting at home marking/prepping is better than no time off at all. In my current job, I work 4 days a week (ok so I am doing 5 days work in 4 days, just so I can get one day off with DS, although now that's uni day!). However I only get 16 days leave a year. That's essentially 3 weeks in total. And we always try to have 2 weeks at Christmas to visit family interstate, so that other 4 days has to last me the other 11 months of the year...
And I too find it hard to get time off when DS is sick or has an appointment (still trying to organise a day to get his overdue vax done, it's really hard to negotiate).
As for after school care, I would have to do this on my current job so it's not any different. I find the corporate world very unkind to mothers in general (I know there are exceptions, but I don't live in an area where there are a lot of options either). I don't get (and never have got) paid maternity leave from my work, only government PPL. And contrary to what some might think, corporate work doesn't necessarily = good pay. I have had a pay rise that equates to $7.50 a week in the past 3 years. In total. It's not even 0.05%. And this was after receiving a top review etc - they thought this was rewarding me! My salary has only risen by about $10K in 10 years. And now my teacher friends earn more than me (whereas I had started on more than them). So pay wise, I am not too bothered.
The thought of having to put my kids in care every school holidays is really horrible. I'd much rather have time off with them on hols, and do whatever I have to do during term etc.
But of course I am not doing this only because of holidays etc. It's more about finding something I can be passionate about again, so work doesn't feel like such a chore, if I am enjoying it , it shouldn't be so bad.