[Aliantha]

I would suggest that maybe you'd be better off looking for a new and exciting hobby. If you do have so much flexibility and plenty of time to do what you want, maybe you need to think of something you could do with that time, which your family would be happy to put up with.

Like the moonlighting post above. Do a bit on the sidelines in the field you're interested in. If I were in your shoes, I'd be really wary of going back into study when my teenagers are just hitting the danger zone, both emotionally and financially.

Anyway, that's my 2 cents worth.

eta: I agree with zen about the job being a way of getting money so you can have a life. Any activity where you know you have to participate regardless of whether you feel like it or not becomes a chore before too long, no matter how much you love it.