I have an indoor Airsoft facility that is 60,000 square feet (four floors), and an outdoor field that is approx 200 acres. These are both 100% dedicated to the game of Airsoft and are located in, and near Melville, Saskatchewan.
These are new facilities/fields which allow retailers to set up mini/temporary stores to sell their products at. So to answer your question further, yes, there are fields/facilities like this, and in my opinion, there will be more of them as time goes on.
Operation Mason Relic Owner