Every country buying aircraft has many things to consider not just the price of purchase and operation.Canada because of its size needs a long range reliable  aircraft that can operate from austere northern air strips,Ability to detect and  kill possible threats at distance.What are these threats ,principally Russian Bears ,Blinders and Backfires with cruise missiles. coming at North   America over the pole.They will be possibly acompaniedby  fighters and be aerial refueled.So we need a long range plane supplemented by aerial refuelling.We currently have justtwo converted Airbus aircraft.
They must have long range kill,Meteor missile is probably the best.
For operation elsewhere in NATO they should have a strike capability be able to defend themselves. As to offsets Magellan  is already building and has a contract for 1000 horizontal tail surfaces for the F35. Boeing the  is already buying components from Canada and I'm sure any future purchase will come with offsets .