Get her set up with a trainer who is knowlegable in barrels and maybe even has a seasoned youth friendly horse to help teach her the ropes to lease. As for the barn thing it is a great idea to talk to barns in your area about maybe helping out around feeding, turning out horses, cleaning stalls etc. Before thinking about the barn in the future I would just worry about getting her a good start properly in barrel racing, do research and find a good trainer and start there.
My 16 year old daughter
My daughter took horseback riding lessons back when she was 10 for a year but decided to take up another sport. She competed in various mini shows at her barn, particularly barrels and did pretty well but it was a small competition. Anyways now she is 16 and decided she wants to start riding again and eventually compete in barrel racing, she also wants to further her riding career by studying equine sciences and agriculture business in college, wanting to open her own ranch. I think that is a little drastic but she has her mind set on it! How should she go about getting competitive in barrel racing and is there anything I should get her into now to help her achieve her goal of owning her own farm. We don't live on a ranch but kinda embrace some of the culture with our city living! Thank you 
