Alternative cancer therapies

Hello,
It's been some time since I've been here to post a question.......hope everyone is doing well! My Dad was not responding to the hormone therapy, so now the docs have started radiation for 13 treatments, then 4 weeks reprieve, then begin chemo. I have been researching alternative cancer treatments, but most are not FDA approved and therefore not covered by insurance, making it virtually impossible for your average middle class person to afford such treatments. I have done some research on the Burzynski Clinic in Texas and the Issels treatment in Mexico. Does anyone have any good info or experience with either of these treatments? Thank you and God Bless, Wendy