Utah State University has published a lit review on the economic impact of bike touring

https://extension.usu.edu/iort/ou-fi...ing_routes.pdf

I particularly like the observation that younger cyclists seek grocery stores and public showers and older cyclists seek breweries, restaurants and hotels. Both groups contribute to the local economy.

The conclusions included "The literature we compiled, reviewed, and report on here is consistent in reporting positive and substantive economic benefits from long-distance cycling routes. Cycling routes are relatively inexpensive to plan for and develop, they can directly generate jobs if route construction is needed and they can indirectly support jobs in local communities through the expenditures of cyclists and their support crews."