[Riff Raff]

Electric or Acoustic? It is easier to learn on an electric guitar because you don't have to press as hard on the guitar strings. However, if you learn on an acoustic, it helps build up hand strength!

The real trick is the buy what you can afford, or what you are willing to give up if she decides not to pursue it any further. You can always upgrade later it she is really into it. Reselling an expensive guitar and recouping your losses is a pain and doubtful.

You may also want to check local pawn shops. I don't recommend buying a guitar that you haven't played. Even for a beginner. You need to feel comfortable when you play. If you don't, you won't want to play as often.

HTH!