NASA offers perhaps the most expensive Airbnb in the world!
The starting cost for a private astronaut (also known as spaceflight participant) to stay at the ISS is $10 million per mission before adding on per day costs e.g. food, logistics support, consumable supplies, garbage disposal, hourly Government astronaut support, etc.
Note that the charges to stay at the ISS do not include the cost to get from earth to the ISS and back down to the earth again. That trip can cost $50 million or more on top of the ISS costs.