I wonder how much of a stir this would be causing if a wealthy "outsider" wasn't doing this but a local that deemed the house not suitable to their needs.
For my whole life Oregonians have had it in for Californians moving up there. We even called not coming to a complete stop at a stop sign a "California stop."
From my understanding there is a heightened sensitivity to housing in Portland. It doesn't have the natural urban boundary that San Francisco does but have a self imposed urban growth boundary that causes distortion in housing prices.