Help my dad beat cancer!

My dad was diagnosed with stage IV Prostate cancer. The medicine currently being used to fight cancer in this stage can only treat it, not cure it. It is metastatic and has spread into most of his bones. The chemo, paired with radiation and in patient care is more expensive than my family can afford. I don't want to lose my dad, I can't. I want him to walk me down the aisle, and meet the grandchildren he'll have someday. We just aren't ready to let him go.