Since they have health conditions, they have no choice but to live in the GTA to be able to see their doctors. Trying to find affordable housing and specialists in other cities will have multi-year long wait lists (ignoring the fact that they don't even have the money to afford movers). Nothing in the GTA is remotely cheaper than what they currently have unless they want to rent a 5bdr basement with 4 random students in a firehazard sharehouse. They are effective trapped there until they die.