PSMA PET scan found cancer in rib and #3 vertebrae. Any experience?

I recently had my 2nd BCR after 11 years post Prostatectomy from Gleason 9 in 2013 when I was 53. Had 1st BCR Nov 21, PSA was .28 then .38 by time of treatment with radiation to pelvic area and 6 months Orgyv. PSA was undetectable for a year and a half. Then 3 months ago psa went from undetectable to .28, my Radiation Oncologist wanted to to wait 6 weeks and retest. My retest 6 weeks later remained at .28. We waited another 6-8 weeks because he wanted to be able to see it via a PSMA PET scan (.50 and above easier to see/find per RO). This time it came back .36 and he went ahead and ordered the PET scan. I found out today it showed up in left rib a #3 vertebrae. Disappoint but says my options are hormone alone until when ever. (he told me 18 months ago if he couldn't cure I had many years. I asked what's many, he says 10 years. I said that doesn't sound like many to me.)
So option #1) Hormone treatment only.
Option #2) radiate both areas and do hormone for two years and see what happens.
Possible opt #3) Scheduled meeting with Medical Oncologist, I'm guessing adding Chemo to the plan may be a consideration.
I'm normally am of the mindset to hit with every available, but I don't want to get in front of my skis. I'm 64 any day and I am active, bike 20-60 miles a week. I enjoy selling cars working full time. I'm blessed to have my hair. I wonder, does anyone have any experience down this path? If I add Chemo, will I still be able to work? Are the side effects bad? Any other suggests or considerations?