Also, do you have any previous experiences with barrel horses? I have a horse sired by Otoes Twistin Bueno, and knowing his owners I know that they would not sell him to just anybody, not only that, if you really did buy him and have gelded him they probably wouldn't see it fit either.
Are you totally sure your purchased these horses? I just can't see an English rider purchasing two very VERY well accomplished barrel horses without any formal training. Do you even know how to barrel race?
Do you have any current pictures of them at their new home place? I am just a little suspicious of this.