My penny's worth for what it is worth
I opted for surgery because I wanted a quick treatment that would, in my eyes, get rid of the problem once and for all. Now, my cancer was still confined within the prostate so that made it somewhat easier to choose the surgery option. That said, based on my research (It has been reported in the US that removing the "mother ship", even if you need RT to deal with the spread of prostate cancer cells to other areas, improves the overall outcome over a period of 10 years) I think I would have still opted for surgery and then RT to deal with any cells that had spread.
Re cost, because I was concerned that my surgery might be delayed ( It took place a few days before Christmas 2021) I did look into going private (with the same consultant and actually in the same hospital: Addenbrookes) but was told that I would not get the treatment any earlier. I saved over £20K by not doing so, though, as a consequence, was not able to sleep at the hospital the night before and was not able to have a nice hospital cooked English breakfast.
Ivan