My only issue is that she bought this awesome stallion for only 1000. Now, he wasn't trained and I don't know much about the breed but the way you described the sire, it seems as though he was a great champion. I would think he was worth much more than 1000. My other concern is that he was going to be used as a lesson pony and kept a stud. That means children would have been riding a stallion, not really a normal occurance. What I was thinking was maybe you could say something like part of your deal was that the riding school would get free breedings or that you would show him as if you were a student of theres to bring them publicity to help them to gain more students or money... It's just a thought.... Either way the story is great and you should keep going.
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"