I am honestly not sure what the best course of action is in this situation, but I just want to say that you are NOT an idiot.Did you have any sort of written agreement with the PM company when you purchased?

Positive SolutionsProblem: In my county small multi-family houses are nearly non-existent and short-term rentals and second-cooking-areas are illegal.Solution: House-hack while renting MTR to traveling medical professionalsProblem: I didn’t know the many laws of the countySolution: A hired attorney 1) informed me that the county calls a house-hack a boardinghouse and 2) drafted a very comprehensive agreement that includes answers to your list of questions.Problem: Interpersonal problems can be a risk.

Are there any lawyers in the Greater Toronto and Hamilton area that are familiar with Master lease agreements?

They are all on a month to month agreement and have all been there a year or more.

But you do have to put some language in your lease  agreement or lease addendum that deals specifically with issues that will come up for the fireplace.  

I have had more than once where the tenant buyer went to exercise their option and I wish that they didn’t, but I honored our agreement and did not look for technicalities to keep them from exercising their option.

You have to sign an agreement that you will come up with the cash if the property appraises up to 10k below the purchase price. 

You definitely want a legal agreement that's forecloseable, getting as much front money as possible so that you're not just in a lurch with nothing if/when they default, and you should get better interest terms for "being the bank" AND I would qualify the buyer just the same as if they had to go to a bank, because you want to know who your partner is in this deal.

Draft precise agreements outlining loan terms, manage risk by diversifying investments, and build relationships with real estate professionals.

Is it appropriate to ask if someone is willing to pass on a purchase & sale agreement template they use?