@rachel5239. I totally understand. As we get older, all of these decisions become more difficult because many of our organs are weak.
Is there a possibility of giving you dialysis support during your chemotherapy treatments to help your kidneys clean it out?
You would need to coordinate this with both your oncologist and an excellent nephrologist so they can work together to monitor appropriate chemo doses, etc for your kidney function level, etc. It's not unusual for people to have temporary supportive dialysis to protect weak kidneys during treatments like chemo.
Are you with Mayo? It may be worth discussing this "team effort" approach, so you can protect your kidney function and also receive your chemo.
Would you consider that as an option?