I've been "in business" doing this for a while. I started off in partnership with an all-around pet sitter, who basically hired me to use me because of my experience with horses. I quickly broke away from her when I got a little tired of being hovered over, not to mention the chunk of my earnings that went to her...basically, she wanted to treat horses like large dogs that I was looking after, and didn't trust my experience in horse care.
I'm wanting to take it a step further and launch a website and some advertisements in my area. I just need a name, and everything that comes to mind is way too corny. I would LOVE suggestions.
Basically, I offer care for boarding barns and private barns when the owners are away at a show or vacation. I don't offer consistent stable hand services, because I do have another job, unless it's a regular scheduled job as a stable hand only part of the week in the AM hours, with other stable hands for other times.