E.C.
I know a great teacher, but he is in Terrell...
Go ahead and get that guitar from Target. You are right - you don't know if she is going to stick with it - so don't go out and buy an expensive one. Maybe she will really like playing guitar, and steady practice will be an incentive to get a "real" guitar and amp!
My son started on one of those little cheapo's from Walmart... he is now a wonderful musician, booking gigs around the metroplex. (With better guitars! :))