We've had a "confirmed" reservation for a place in Portland ("Pent House Condo") for the last two weeks of August since April. We're supposed to leave for Portland a week from today and just yesterday the owner canceled the reservation citing an HOA rule of no rentals less than 30-days. Did he not know this before now? Curiously I checked the calendar for the unit and it shows "Updated today" (i. E., 8/4/15) and "Minimum 13 night stay". Apparently Airbnb doesn't do a very good job of vetting its listings and the people list on the site. Fishy operation!