Hi,
It sounds to my non medical opinion that your cancer is on the aggressive side. At 75 I would think that it might be easier to avoid the affects anesthesia could have on your body plus recovering from surgery.
If it was me I think I would go with some form of radiation with ADT drugs before and after radiation. Xray sources like Cyberknife will max out an area if the cancer returns plus can also affect your bladder since the rays go past the intended site. Proton radiation hits just the site and does not go past it. Proton can also be used multiple times in the same area if the cancer returns. With that being said if you have access to a Proton machine, great. If not a Cyberknife like option would also work. If you have access to both types of radiation I would do Cyberknife 1st the Proton 2nd. Work with doctors that want to work with you, second opinions are not a bad thing.

Dave 3+4