Maura that's the only way I was able to show A's.
Best way to get started is locally. If you ride at a barn that shows, let them know you are braiding, they'll be your first clients and then usually it's word of mouth. Work something out with your trainer, friends, whomever you ride with. Plan to add at least 3 horses to your list at a show once you get good. I usually had at least that amount that would approach me at an event, sometimes more. When you start out 25/mane is probably average, as you get cleaner and quicker, you can go up from there. I charged 70.
My best advice is practice pulling and braiding manes on a variety of horses so you get accustom to fixing other people's oopses (none of the manes are ever perfect) and working with unruly horses.
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse