Hotel Trophy Building for passing Passenger #s

Just an Idea for passenger # achievement.

The idea that is you pass a Passenger # Milestone after unlocking the next airport, that you get to build a Hotel from one of the generic blocks at the airport.

For example, I am close to passing the 1 Million passengers mark at Innsbruck. The Hotel would be kind of a Trophy Building. And maybe at later marks you could add a Star :star: to the hotel.

At other Airports the passenger marks would be higher but it’s just a suggestion.