Grrr. She sounds like a major pain in the butt to me.
You should give her a good talking to. Tell her it's really
stupid to buy an unbroken horse and try to 'train' it. If she can't fix the problems that her first horse has, she isn't fit to train a greenie.
Also tell her that if she really wants a horse to get an old, calm one. Than preceed to ask her a basic horse question. If she answers wrong, tell her to forgot it, get some lessons, and than think about a horse.
It's tough love. Sometimes it's the only thing that works. I'm tellin' ya, if she is a real friend, she'll understand. If she wants to get into a huff about it, she isn't even worth it.