I can't comment on initiatives to buy these units by the federal government, but I can comment that if there are indeed 30,000 Airbnb units available, if they do come available on the market, they will increase the supply available for Canadians.
I would like to note that the supply shortage in Canada is quite acute. We need millions more units of housing. Actions on Airbnbs are certainly constructive and can be helpful, but I think we really need to focus on increasing the supply of housing on a much larger scale.