I am so sorry to hear your news. This is, indeed, a very difficult time for you and your parents.
You mentioned that your father is being treated at Vanderbilt. He is very fortunate; this is one of the better places for bladder cancer in the country. I am sure that others familiar with it will also reply to your post. Cancer Centers of America is a for-profit chain that specializes in cancer patients. They are not known to have any superior expertise in bladder cancer. If you feel that you need a second opinion on his condition, you should consider other top centers such as Johns Hopkins, Memorial Sloan Kettering, in NYC., or MD Anderson. The University of Chicago is another good place.
If, indeed, your father's diagnosis is correct, please consider enrolling him in a Hospice program. If he makes progress against this disease, he can always be "unenrolled.." These programs are absolutely wonderful and would provide all types of help for your mother and for you. Both my mother and my father benefited tremendously from Hospice and I knew that they were there to provide the support I couldn't from a distance. Most people wait until too late to consider this help.
Best wishes to you and your parents...
Sara Anne