Good idea. They can be lived in until the time comes to push the button. 

Think about the poor graves. They'll be graveless.

I was expecting you to suggest the suicide pods. I'm disappointed in Canada yet again. 

Aardvark

AskSN

If given the task to solve homelessness, what would you do?

First thing I would do is stop printing excessive amounts of money. Housing crises are largely caused by expansion of the money supply more than supply and demand. People bid up prices of scarce assets when the monetary supply expands. 

Obviously there is much more to homelessness than just the cost of housing but it's a good start. 