Since you’re considering converting the upper unit into a short-term rental, you may also want to implement strict rules around smoking or strong odors in your house rules to avoid future issues.

I doubt if you'll have any issue with your hold period since it is all about your intent anyway.

I do agree the lack of control is a potential issue.  

RESOLVE this issue NOW and make a clean break. 

It might be wise to remove the listing, and relist as a brand new place now that you have a solid cleaner.Some of the comments show that the paint has issues etc.

I know conventional lending could become an issue depending on the condition of the property.

Today I had a heater issue and snow company that was late handling commercial before residential so we ended up clearing it.Open to each option.

I have not every purchased property in Canada, but my wife is Canadian and I've seen some of the issues her family has had to deal with.  

The brother was fed up and needed to sell, but there was a significant issue.

While I think I might have paid slightly above the average price, I’m happy with the installation and impressed with how quickly the installers resolved the issue.