Oh, and as far as the Honda Rebel's and Ninja 250's I've priced around here; I can usually find decent, low-mileage Savages for less money, and it's a longer term bike. Why buy a bike you're going to ride for 3-6 months and then outgrow? Seems like a waste of time and effort, even if you do get your money back out of it.
These bikes have been around for a long time, and they are dirt-simple to repair and easy and cheap to find parts for when you need them, so it's no big deal if she drops it and bangs it up a bit. Most of the used ones for sale I find are ridden by women and beginner riders, and they aren't beaten on or street-raced like a lot of sport bikes, so even the older ones tend to be in pretty god shape mechanically, as long as they haven't been neglected too long or left out in the rain for years.
Good Luck!