Sorry to hear about your issues. That would be a tough choice.
About the tendonitis, I've had it for years now in my elbows and forearms, brought on by overuse. Pain killers and stretching help it, and eliminating the overuse (partly work related, partly wood carving). Treat the cause and not just the symptom and you'll be better off. I still have flare ups, and have to be careful to avoid excessive use and repetitive motions. It's not cured, but it's not something you need to postpone your retirement for.
I would keep an eye on that blood pressure, you can get machines to check it at home. Low blood pressure can cause dizzyness and fainting, especially when getting up from a seated or lying down position, and especially if you do it too fast. Get up slowly if you've been sitting or laying down for a long time.