I am finding this one tricky to answer since my hubby, 61 at diagnosis, PSA 25' Gleason 10' spread to five areas and lymph has not yet had chemotherapy, is on an old Hormone drug and is still OK after more than five years. A bit like Paul, I'm sure we would have said yes to chemo if it had been offered early, but with hindsight I am rather glad we still have it in the Arsenal to use.
We have been told it would still not be offered over enzalutimide when the time comes (as it surely will), the medics seeming to prefer enza. As my hubby gets older and more "damaged" by the side effects of treatment I do wonder about chemo and whether he will ever want to have it. I'll find out one day I suppose.
I am younger by 8 years and still working and we would manage ok. Please be sure about one thing, one of our friends here on the forum (Martini) died from an infection during chemo. It's not to be sniffed at.
A hard decision in your circumstances, I wish you well whatever you decide.
Devonmaid