The solution can not be more rentals.    Rental price is a mere reflection of housing market. 

Detached homes are vastly under utilized.   I know too many detached homes occupied by less than two people.     Many are sitting on them as investment.    

Vancouver population has not grown much.   So demand is not the problem, now that foreign demand is taken care of.   The problem is supply of the right kind.

ALR
DETACHED HOMES
SUPPLY

Let old folks move on and let young families utilize detached homes.   There will be lots of rentals available quickly.