This article in the New York Times recently talks mostly about the boom in Denver (a city with similar price increases and inventory woes as Portland)  But I can tell you as a Realtor for almost 30 years now in Portland while we have always been known as "pot friendly" and I have always had 3-5 people a year asking me about grow operations this last 12 months or so its coming up all the time!  Oregon has some specific laws on what you can do personally (grow up to four plants) but we have had several real estate sales recently for buyers in the cannabis industry.  You can see the article here...