when I was a kid Mum used to drive us about 15 minutes to catch the school bus which would then take us the rest of the way. So I think that a 20 km return trip is nothing personally.

I suppose the way that I would look at it is - if you love the school then what sacrifices are you willing to make to send your child there? Is the extra time in the car worth it to you? I also think that once you are in the car it is realistically only about and extra 20 minutes a day which in the grand scheme of things isn't a huge amount.