Personally, I wouldn't travel more than 10 or 15 mins to get to a school for my kids. There are so many after school activities, and friendships, that she will want to participate in that will be much harder if you are further away. Also as a PP has mentioned, having to rush to pick her up if she is sick is that much harder when you are a long way away.

In your shoes I would move house if I couldn't find a suitable school nearby.