Leasing would be difficult. Unfortunately, I don't think most of the property owners/managers like the idea of an airsoft field. Would just take one AH transporting his gun without a case and you'd lose the space, if they let you have it to begin with.
As for the stores... I have to imagine it's difficult for AS stores in Canada. Stock is expensive, hard to import and we don't have much of a customer base. Think of all the different items you need to stock, all the guns, parts for those guns, accessories, upgrades, tactical gear.... etc. Evike probably does more business in one day than some of the stores up here do in a month.