So you're going to have towns full of retired old people? Maybe also include their caretakers and maybe service workers supplying everything the caretakers need. Oh, and schools for the caretakers children. And teachers, obviously. And maybe some industry for the caretakers spouses to work at.
Retirees aren't going to keep towns alive. They're just usually among the last to leave.
SIM card removal, antenna destruction, etc. Will only help us until they play the insurance card. Can't afford shooting down the road in two tons of steel without insurance.