Again, you should be able to put this into motion as long as you start a paper trail now, if you haven't done so already; you want accounts from different Tenants covering different instances in writing to show a pattern. 

And, as someone already pointed out, you will need to document that you have an egress window, show a smoke detector in there, etc.  

@Brian Bardzik don't they just make stupid water detectors anymore? 

Change smoke detector batteries, new thermostat battery, replace furnace filter, look under all sinks, drain water heater once every year, look in the attic.

I make sure led lightbulbs are in all fixtures and smoke detectors have active batteries.

Motion sensor bright lights.

You can set it up so you will get a cell phone alert when the camera senses motion. 

Smoke detectors, GFCI outlets, handrails, working heat and hot water, etc.

I was required to add exit signs in the shared hallways / stairs, and to add interconnected heat detectors in all units, and to upgrade all smokes in all units to be hardwired, and to create 1-hour fire separations between the three units, which we accomplished by painting the ceilings and walls shared with stairwells/common halls with intumescent paint.

New heat sensor smoke detector because the old one went off any time the stove was used.