I knew an army veteran whose wife had cancer, and she was covered for cancer treatment. The downside was that she had to drive several hours to the facility. If the Department of Veteran Affairs can't help, www.va.gov you might try contacting the American Cancer Society to see if there's any assistance they can offer. They may even know what's available for veterans.
American Cancer Society http://www.cancer.org/ (1-800-227-2345)
If you can find help as a veteran, and have to commute, they might be able to hook you up with volunteer drivers also, to get you there. You shouldn't have to drive in that condition.
It looks like you've been through a lot.