Don't do it because you think it is family friendly. I've met women who have done this and left after 2yrs. Yes, you have school holidays but you also have the lack of flexibility that goes with this such as not being able to take the afternoon off to watch your kids sports day or nativity play.
It is a fabulous, amazing job when it's good but it is seriously draining when it's bad. They don't all sit there eager to learn and you don't go home every day with a real sense of achievement.
The paperwork is dull and the planning gets you down. Even with PPA, if you're f/t you must be prepared to give up some time at weekends. This was the thing I hated which is why I work p/t.
As I say, I love it and wouldn't want to do anything else but you've really got to feel that way to be able to do it. If you don't, you will find it very emotionally draining and you'll end up hating it.
Best advice is to spend time in a range of local schools. Ask to help out familiarise yourself with what the job is really like.
Good luck!