My very brief answer is to start by maximizing renewables. Jurisdictions that have done that have seen a cost benefit. We can currently produce wind in Alberta, for example, at a lower cost than natural gas power.
Stability on the grid can be provided through a number of options, including increased investment in storage and interjurisdictional interties, so the batteries.... With jurisdictional profiles being different, your hydro in B.C. can be a battery for your wind in Alberta. Be creative about the distributed energy resources. All those electric vehicles that are going on the grid can be a battery in the future as we work through the details about relying on those at peak periods.
What we have to do is build out for the moment we need the most electricity on the grid, and through using some of these creative flexibilities, like household solar and interties, we're going to be able to build a lot less to still have the same power available for Canadians.