[mitthrowaway2]

I'm not sure they would need to be accounted for. I think opposition to AirBNBs is a product of severe housing scarcity* and in a scenario where housing is abundant and rents are low, people would be much more welcoming of AirBNBs.

* (Or in some places like Kyoto and Venice, it's due to over-tourism complaints, but I don't think anywhere in Canada is struggling with that problem.)

[ForestCritter]

Tourism is a major industry in Montreal, probably as much as venice and Kyoto with year long festivals and the fact that it is an Island is also an issue.

[mitthrowaway2]

If opposition to AirBNB in Montreal is mainly coming from locals being upset about the excess of tourists rather than the deficiency of rental vacancies, then I stand corrected.