The cost of buying a house and the cost of living are not the same thing. For instance the price to rent ratio in Vancouver is about twice as much as it is in Seattle. In any case all of this is completely irrelevant. The cost of living and the salaries are lower in Vancouver than Seattle, a fact that isn't up for debate. One of the core factors that have driven technology companies to expand beyond the valley is the cost of salaries, this is one of the reasons that the sector expanded so much in WA, and it's one of the key reasons that it is _currently_ expanding so much in B.C. None of this is theory, or me arguing for what I think will happen, it is what's happening right now.