OK your friend should not be buying a green three year old. She does not know enough to train a horse on her own. The conformation is really beside the question. Even if this was a gorgeous OTTB or jumping bred warm blood, I’d say no.
Your friend should try to find a lease on an older seasoned horse, maybe a retired kids show horse. Maybe a half lease, maybe a full free lease where she pays all expenses. She will learn much more that way.
I have seen so many adult beginners take on green broke horses that are nice enough personalities then create a problem horse that takes years to fix.
Yeah these horses are cheap. But not if it takes years to be comfortable riding it. And you get hurt and lose your confidence in the process.
Just.say.no.
Green plus green equals black and blue.