I've commuted much farther than 30 minutes for work, and it was totally doable. That said, it would still be a huge pain for school. You're going to have to go in and stay ALL DAY and likely into the evening, because you won't just be able to pop back whenever you need something. It will also totally change your experience. If I get into the (one!) program to which I applied this year, I will commute roughly 30 minutes by car, and that is plenty for me. This is because I am married and can't just move for school. But I know it is going to be a VERY different experience than in my last masters program when most of the time I lived right on the outskirts of campus, and never more than a mile from school. Social life alone will be totally different and I don't expect to bond with my fellow students the way I did in my last program. I guess it doesn't matter to me THAT much because I already have that experience under my belt. Still, I don't want to be that one annoying student who can never meet for group work at night or on weekends because it's too inconvenient.