I wouldn't myself. I don't think I could get into the role playing part of it. To be completely honest, as someone who rides for a living something like that would read tourist trap to me and I'd expect to go into it having to ride with a bunch of folks that were completely inexperienced or 'weekend warriors'.
That's not to say it couldn't be a profitable business, I just don't think that the true horse set would be the crowd you would draw.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.