Hi Catherine. I was a caregiver for my husband who was diagnosed with prostate cancer in 2008 with several recurrences and with bladder cancer about five years later. I was able to think of a few things you might want to consider ahead of time. IF he has surgery, immediately following, steps were very difficult so we made arrangements for my husband to sleep on the first floor (on the couch as it was just temporary and it's comfortable) and I slept on the other couch to be near him. I had a neighbor on standby to help me when we arrived home from surgery as my husband is a big man and I wasn't able to support him physically myself. My neighbor was also on standby in the event of an emergency (to watch the dog - the kids are grown), to provide transportation if needed and to do shopping or errands I wasn't able to. I kept a written record so I would know what meds were given and what needed to be given. And just as important, pay special attention to make sure you're taking care of yourself. It's really easy to lose yourself when caring for someone else. But your ability to help him relies on your taking care of yourself. Think about the usual self care - nutrition (for both of you), exercise, rest, meditate, pray. When you can, find time for your own interests. Ask others for help. People always want to help but they don't know what to do and are often uncomfortable asking.
Best wishes to you both. I hope your husband does well with whatever treatment he has.