Interested in Physical Therapy?

Hello, I am in the United States Army, I already completed hold a B.A. in Political Science. However I have a new found interest and am looking at maybe pursuing a PT Degree, with the goal of ultimately becoming a Physical Therapist.

My questions are: Would the B.A. fulfill a lot of the non core related classes. Secondly what would be a good secondary Bachelors degree, its hard to find one that lines up directly with PT, or would any science degree work? Also another question I have is the time to complete the degree also? How many years after school and clinical's etc, would I be on my own. I am also mulling the idea of my GI Bill so I can cover part of the 2nd Bachelors and maybe some of the graduate degree.