The app had its own issues.

However, for major issues, STR insurance ensures you're fully covered.

Based on a quick answer from Perplexity it seems like there would be no issue with you buying the home and collecting passive income, but you may not be allowed to manage it yourself since that is considered active work.

In general it is not worth building a single ADU for a variety of issues but the largest is the cost to add the ADU is typically far greater than the value added by the ADU.  

However if you are doing it with a conventional loan, you will definitely run into underwriting issues if that is noted on the appraisal. 

There i a bit of research that needs to be completed early on in order to get a good judgement on the feasibility of this; from there, the "Official" way to ensure you could pursue this would be to request a "Zoning Opinion Letter" to receive an Official decision from the Department of Zoning in order to ensure this will not cause any issues during your permit review. 

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.  

Both told me the apartment floods so bad amongst other issues.

A year ago I recently purchased my first multi family to house hack and I rant into a issue when the seller paid for a electrical upgrade to the home.

I'm an independent agent here in AR and I write a lot of rental property, with ~6 preferred markets and if the properties have some issues, age, claim history etc.