The issue will be if you have a number of rooms and a single abuser. 

This doesn't give me too much to work with, and as a student, I still have 0 income :(.

Moreover, the government has made it very clear that it wants to attract foreign investment and a measure like that would be totally counter-productive and downright dangerous and negative for the country and it's the economy.

Depends what you're looking for really, it might be worth discussing your strategies and goals with a broker, a national lender, and a local CU. 

I feel bad for the pitbulls, they need to go somewhere but the owners also need to be responsible with them and as long as you make that clear then you shouldn't have a problem.

At the moment with 3 rentals (6 total units), I have one account and a credit card associated with it.

. - 1/1 and a 3/2 instead of 2/1 and 2/1)2.

We have two rentals rent by room and a househack duplex.

In this manual (which I assume could be modified to provide to tenants) I include all the financing information (which you would not include for tenants) bank accounts, mortgage accounts, payment information, and mortgage payoff), a list of the contractors, what each contractor does, a list of upcoming planned or necessary repairs, and a copy of all leases associated with the property.

And as more happen, more will happen just out of FOMO.