The Mexican Caribbean is awash in short-term rentals—and prices are feeling it. A recent market briefing put active Airbnb listings in the Cancún–Riviera Maya corridor above 17,000, with tens of thousands more properties sitting idle statewide. The signal is clear: Cancun vacation rentals are cheap compared with Pacific peers, even as luxury branded residences and new airports promise more demand. Now Quintana Roo is tightening rules, forcing hos…