I read through all of this and as scary as it is, I have to side with Airbnb on this.
Your son can pick up a pill anywhere. Not just an Airbnb. Hotel, store, playground, beach. anywhere. It is so small and under, in or close to a couch. Very hard to vacuum properly.
Just be safe out there. Thanks for the reminder to be careful. We just stayed in one where the plug sockets came out and our baby is at the stage where she likes everything about sockets and switches.