So I read the first page of this thread and then the last few here where you started talking about buying her. I have to say, this little horse is lucky to have you in her life. I'm knocking on wood, crossing my fingers, holding my breath, sending vibes and anything else that could possibly help you buy this horse.
The only advice I have to offer is, don't be scared off if the initial answer looks like it might be no. Sometimes people just need a little time to digest things. That being said though, you know her better than anyone, so go with your gut on what you feel is right. Best of luck!
EDIT: Just reread this - "her" = BO.