POA Concerns, suggestions?

My husband and I have been married 45 years--he is 82 and I am 71 and we never had children. We are currently still Durable POA for each other. At this point he would not be able to oversee the responsibilities of being my POA if it were to ever become necessary as I am his caregiver. I asked my brother if he would be my POA and he did not want the responsibility since he is not much younger than I am which I can understand that. I have a nephew I have always been close too who said he would be glad to take it on if ever I needed someone to take over. I believe he is a responsible and trustworthy and a perfect choice. However, he will be moving from the USA to Europe in a few years with his wife and family to where his wife is from. However, he says he does not see where that would be a problem being my POA due to the fact so much business can be handled electronically nowadays regardless of where one lives. Also, he plans to fly back home to visit sometimes the way they fly back and forth to Europe now to visit his wife's family. I understand all that, but based on personal experience being my mom's POA I know there were times a POA needs to be hands on at times, at least for my mom it was, which was not a problem for me since I was also her primary caregiver and was local. I do not really have any other appropriate family member to ask at this point. My best friend is older than I am, so I know I could not expect her to accept it at this point in time. The more time goes by I am thinking I may just have to be one who will not be able to have a POA and just hope and pray I never need one.

Would very much appreciate hearing any suggestions or thoughts you might have that might help. Thank you.