You should reach out to @Elliott Milek, he's a savvy cross border accountant who also invests in US real estate, and resides in the Ottawa area.    

My suggestion would be go on your overseas tour, save up , continue your education  and when you get back try and find a small multi (2-4) unit that you can house hack and rent our your current residence .   

Residents were a mixture of leases and month to month tenants.

We have informed the tenant that they should look for another residence as this will take some time to fix. 

Has anyone ever used it in a residence?

Pen Fed has a rule that if you have 4 or more properties in your name then they will only do a HELOC on your primary residence. 

Here in Florida, attorney's fees are statutorily recoverable in all residential tenancies and even seemingly minor noncompliance by a landlord can produce a dismissal of their eviction and a judgment for fees against them, despite a non-paying tenant residing in a rental.This is not legal advice and does not create an attorney client relationship.

This is an interesting question for sure and yes I’d agree that the real answer may reside with the local city council and may be different depending on the state and associated zoning regulations in place.

I have recently requested to have my PMI dropped on my primary residence because I believe the value of the property has increased enough to merit the PMI cancellation.

I need a bit of guidance please, what are your thoughts on purchasing an investment property before purchasing your primary residence?