Don't know exactly where you are located, but the girl I bought my mare from is a professional horse photographer. She does really nice work. Her name is Lori Walton. She is located in Blue Ridge (north of McKinney). But she has a job in Dallas or Plano, I can't remember. Google "Walton Ranch" and you will get the website where she sells horses and a link to her photography business.
Also how about the girls at Pixelworks? I think they take on projects like that.