I traveled with my husband and two kids for a year around the world. We learned a lot about how to book the perfect Airbnb.

American cities are cracking down on Airbnb — so it's expanding rapidly in countries like Brazil, Mexico, China, and Japan.

If rentals are curtailed in Paris, the company could look to expand to nearby cities or rural parts of France where there are fewer regulations. For Airbnb, that might mean moving into new countries.