This isn't really a problem in this case.

Housing in Vancouver is _incredibly_ expensive, and there's a huge amount of foreign ownership by rich people that leave the dwelling empty all the time, or maybe only live in it for a few weeks or months per year.

If someone is wealthy enough to own a property in Vancouver and not use it more than half the year, I don't have an ounce of sympathy for them being taxed for that. If they don't like it, sell the property, and rent an absolutely beautiful AIrbnb or house for the times that they are in the city.