Edit - Examples pulled from the notes from 2019:
Paris - AirBNB $650 a night, 3rd story walk-up ~1900 sq feet apartment with a balcony. Hotel price for something similar? $12,442.00/night. Hotel for a basic room ( ~300sq feet) ? $220/night.
Barcelona - 2nd floor apartment in El Born. ~1500 sq feet. $590/night. 1500 sq feet room in a hotel? There were two in the entire city. Price? ~8k/night. Basic room in a hotel? $180/night. King room in a hotel ( ~370 sq feet! Amazing! ) $440.
I can go on and on.
At below hotel prices AirBnb competes with cockroach infested motels.