Barrel racing. Not to knock barrel racers but anyone with a little knowledge can train up a decent barrel horse in a rather short amount of time. Reining takes a lot more effort and intelligence. You would definitely need a REAL trainer to train you and your horse. It's SUPER easy to mess one up. They also have to have some kind of natural ability to rein.
Barrel racing shows are cheaper, the classes are inexpensive and that's all you pay for. Reining classes are more expensive and the shows are few and far between, so you will be looking at trailering, hotel, stall, etc.
Barrel racing would probably be a better bet if your on a budget.
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