You don't say which part of Arizona you winter in which may be part of the consideration. I'm in the Phoenix area and this year we didn't have as many hot days (110 and up) as other years but we did have a mostly hot, humid days with lots of rain and thunderstorms. Two other issues to consider, lots of area flooded this year that normally do not and as you probably already know, Arizona is very, very dusty. Since you are shutting off the power in summer, temperatures could be pretty high within the appartment with the possibility of some pretty high humidity as well. Perhaps when you arrive you could contact one of the shops with good repair technicians about the situation and what they would recommend. My other suggestion would be to make friends with a permanent resident and make arrangements to leave a machine with them.