Average rent for a 1-bedroom is not a good deal. It's much cheaper to rent a single room in a larger house or apartment.

4500 per month, divided by 4 rooms is $1125/month, not $1200.

You can book the whole house and fill it with friends.

But look, it really doesn't matter if you're paying $1125 or $1200, that has approximately 0 impact on the actual conclusions of this post.