I am so sorry to hear of your husband's kidney cancer. I read this site to find hope, but there seems to be little.
I have stage 4 metastatic RCC to the bones. I just had my first anniversary of my diagnosis. Although I am new to the cancer experience, I think a positive mental state is crucial! There are other things that I am doing, such as a healthy diet, rich in protein, prayer, exercise, organic fruit, and mangosteen fruit juice, for the anti-oxidents which I hope will attach to the free radicals, to help my body be stronger to fight the cancer.
I was on Avastin and Aredia, but I had to go off of all drugs because I developed Diverticulitis. You might want to find out your cancer "markers" which tell your oncologist which genes you are lacking for fighting off the cancer.
My two markers are VEG-F 3+, and EGF-R 3+. The Avastin is used for colon cancer, (marker VEG-F) and in phase 2 clinical trial for Renal Cancer.
I hope this helps, it is always worth a try to find out what you can, and be active in your research and treatment options.
Take care, and good luck.
Sandy