Sorry to hear of your husbands PCa Moozel but as many on here have already said, don't despair, his diagnosis has a lot of positives. Mine was almost exactly the same, 5 of 5 sample on left side, 3 of 5 on right in my case, plus a suspected nymph node, T3 was my stage. I had hormone therapy, radiotherapy and HDR brachytherapy as not suitable candidate for surgery.
Diagnosed in 2015, now almost 5 years later and I have no real side effects and my PSA is less than 0.1 for the 3rd time, so whatever you do not let this get you down or let it get on top of either of you. My wife gave me the greatest support for which I am eternally grateful, so just remember, you can and you will beat this.
All my best to you both going forward
Mike