That's not at all clear. The cost to resolve civil conflicts is something both basic economics and the law factors into regulation all the time.
Further: two very common kinds of contract we're talking about are with the state itself.
The first and most obvious is zoning, wherein the state promises to reserve some piece of land for a specific use, and private entities purchase that land with the expectation that it will only be used that way. It's for this reason that you can't build a hotel anywhere you want.
The second implied contract we have with the state are the codes and regulations governing residences. Long before Airbnb, residency codes had tenancy requirements.
Finally, the law itself has something to say about people who enter into contracts in bad faith, deliberately misrepresenting their intentions or circumstances in order to obtain concessions: we tend to call that "fraud".
