My wife originally came from SW England, moved to the NW in her late teens to become a nurse.
For years we visited her family down there regularly, many years on and she was diagnosed with early onset AZ.
At first it was fine, visit then we'd go home back "up north" until the day she wanted to stay down south.
To say the least it was upsetting for everyone present, her family asked me to consider move down and I seriously thought about doing so, however, we had good support available where we were and people in a similar position to me didn't have much good to say about the help they received in the south.
Hard one to call, have you checked out what's the available help is like in the area, memory clinic availability, hospital if needed? As I say hard one to call, can't do right for doing wrong as my mum used to say. K