Unfortunately tenant's do things like this fairly regularly.  

Insurance companies rank them as an aggressive breed and some will not insure your building at all and others at 3 times the regular cost.You can ask the tenant to get their own insurance for the animal but they tend to get insurance for one month and then drop the coverage and never tell the landlord.The dog biting other tenants is a real concern.A young family might be concerned to rent your units but as mentioned another dog lover with a high risk breed might find the situation a plus.  

That is, he or she has been able to think beyond the routine way of structuring a deal.

You can't enter someone else's home unless it meets the conditions of your lease (regular inspections or notice given in xx hours advance to make repairs or let the property). 

We regularly give the three basic options for coverage that you will hear debated on BiggerPockets.  

I will say this is the least attractive of the three safe harbors as the De Minimis Safe Harbor (DMSH) and the Routine Maintenance Safe Harbor (RMSH) will likely yield better results. 2.

I was thinking of converting from a regular IRA to a SD Roth IRA but failed to state Roth in my first post.

I am researching this last point as I would like to establish whether smoke is a strict requirement of the regulations.I do know from meetings of a landlord association that the big corporate landlords in Ontario are moving to inspect smoke alarms twice yearly as a matter of routine.

You may get some tenants playing games (Oh, I mailed it to the other LL) so you'll have to keep a solid relationship with the previous owner for a month or two until the new routine kicks in.You can try to get them to sign new leases upon the sale but they are under no obligation to do so.Sorry, I'm not familiar with the Section 8 rules to help you on that front.

Our regular guy will paint for $25/hr, but we have had to reach out in tight turn-around situations and have paid $40  (and felt fleeced the entire time).