Little late with this but maybe?
I had a intensive linebred skipper w mare that was probably the best using horse I've ever crawled on! That covers a lot of horses folks. There just wasn't anything connected with a cow that she couldn't do. Cut, sort, rope,drag all day and then heel that night. Lots of buckles in the case from her.
But one of the first things I found out about them was that you COULDN'T make them do something. And for sure, don't make a mistake when you train them because they don't forget. She would toss a female rider just for kicks just because and did it to some pretty good barrel racers and was a coon stomping killing machine if she found one.
I have a 3 yr old filly out of her but she is way past me being able to do anything anymore. If anyone out there knows of a good person looking for an inexpensive started mare,point them my way.
So here's the deal-be smarter than the horse and you'll get along fine with him!