Without wanting to piss on anyone's bonfire I feel obliged to point out that, actually, getting onto a PGCE is massively difficult nowadays - very few places, lots of applicants. Having done that - getting an NQT job is again very difficult. Lots of unemployment in teaching, currently. Finally, teaching would definitely come at the expense of quality time with your children, particularly in the early years. Planning lessons, marking, producing resources, etc takes up HUGE amounts of time, certainly in the first few years you are teaching. (You learn to wing it a bit more after a lot of years - plus you have a good bank of resources/planning to draw on).
It is family friendly in a lot of ways. I've got 5 DCs and teaching has fitted in very nicely with the holidays - but I'm always completely knackered in term time and not much fun/good at doing stuff because I'm swamped with work. So no, I don't think you can take up Brownies/cello lessons/football club, etc, darling - I can't be arsed to get in at 6.00pm, try and cook tea, run you to practise, sit around for 2 hours in the cold, collect you, drag you home, sort you out - and know I've still got 3 hours flaming marking to get through before tomorrow. I don't want your friend to come to tea because I don't think I can bear to see another child today. I don't want to take you to your rugby match every Saturday - because I've either got hideous amounts of schoolwork hanging over me, or because we have no food in the house, no one's bed has been stripped for a week, I haven't hoovered, cleaned the toilet, washed any clothes, walked the dog, paid the bills, or rung your Granny for a fortnight...
It is swings and roundabout, IMO. The holidays are very handy - no problem with childcare and great to spend all that time with my own kids. The term times are hellishly unfriendly, however, and in a 9-5 job at least you are then done for the day (generally).
As a small aside I teach 8 classes this year (secondary). 30 pupils on average in each. 240 books then. At 5 mins per book (very, very lax marking) that's 1200 mins - or 20 hours marking per week! To be done in your evenings...