Hi Lester
Welcome to the forum. The fact is that no one can predict how long your father might live with this disease but he has had a great reaction to the hormone therapy so that's really good news. Just to give you an idea, my hubby was diagnosed at 61 with PSA 25 and g score of 10 and spread. That was over five years ago, our lovely friend Mo's husband was not so lucky, if you look at some of the profiles (for example alahays) you will see there is a great variation, he has been travelling this road for 8 years. So there's a lot of hope for your dad, early chemo is said to be a very good thing and the newer drugs have been very welcome, a few years ago there was very little to stop this disease, now there are options to keep men alive longer. Obviously, you know that once this cancer has metastasised it cannot be cured, only held back, but hopefully the length of time and quality of life for your dad will be good. Don't give up hope, Abiraterone, Enzalutimde and radium 223 were not available five years ago, who knows what the next five years will bring.
Kindest regards
Devonmaid