The bit that is depressing is when they are at school being on your own in the middle of nowhere with nothing but the four walls and the vacuum for company.
Being truly "in the middle of nowhere" when you have children is never a good idea anyway - apart from anything else you end up having to run them here, there and everywhere instead of them being able to walk, cycle or get the bus.
We bought the house that we still live in when the kids were 8 and 10, so about 20 years ago. The idea was that although we're in a small village we're also on a bus route, so they could get to school and back and quite a few of their friend lived in the same village anyway. There's a park where they could play to their hearts content, we never worried about them for one minute.
Then, once they got cars at 16, they were really independent .
Anyway - part time work while they're at school? Gardening, cleaning - there always seem to be people who want or need this sort of stuff doing.
*Edit* - and do what I do when you have a spare hour or two and you're feeling fed up and pissed off with the world. Get on your bike and ride - good for the body, good for the mind and especially for the soul.