I had prostate surgery in 2017 and 5 years later it metastasized to my abdominal lymph nodes making it by definition, Stage 4 prostate cancer. My mother's 6 brothers all had prostate cancer and died, but lived long lives thanks to treatment. I had 39 radiation treatments and have been taking hormone suppressants for 1.5 years, Lupron Depot, Abaraterol, and prednisone.

I don't like taking the drugs, because of various side effects, but I am pleased that now I have the odds on my side for life. I determined it would be short-term selfish and long-term foolish of me not to pursue the very best medical advice. Your husband's numbers are not marginal, and although unusual, sometimes prostate cancer can take off.

I hope this helps. But most of all, I would pray about it and seek second or third opinions.
One last thing about the consideration of Ivermectin... I suggest searching cures for cancer and see if you don't find hundreds of anecdotal testimonies that anything from fruits and vegetables to pine tar is promoted as a cure.