We have cameras at every property and review them often.

Deadbolt, camera, thermostat, sheets, towels, rock and roll. 

Cameras may help.

If you're concerned about issues, make sure to have a camera pointed at the driveway, smartlock that logs all the comings and goings, noise monitor inside and you can even place one in the backyard, and lastly get damage rental insurance on each booking that the guest pays for by baking the charge into the nightly rate.

Now we were out there in April with a plumber due to roots in the sewer line, the plumber and I were there for around 4 hours he ran a camera through the lines and cut out all the roots and then ran the camera through it again and the line was clear.

But a couple of cameras streamed to the building website with the threat of $$$ fines made everyone behave just a little bit better.

Its like trying to educate your kids and make sure they behave when you leave them home alone and you are not home and do not have any cameras to watch them,

Can I put up cameras on my multi unit property? 

I've seen these situations spiral out of control and lead to occupants neglecting/damaging the property, such as making holes in the wall to look for hidden cameras, nailing doors and windows shut, etc.

-Sauna-Hot Tub-Patio/courtyard (large cement tiles on crushed bluestone with lighting, natural gas line to bbq)-Secondary patio off primary suite-Losing sq feet in the primary bedroom to enlarge the bathroom-High grade cabinets-Appliances with cabinet fronts-High end appliances (Viking/Miele instead of GE Cafe)-Outdoor shower (teak box walls with a dry well beneath the footprint)-Wiring for Cat6 to every room-Wiring for surround speakers (or including the speakers that are built into the walls)-Sonos whole-home audio system-Hardwired cameras (with on-site storage) to the exterior of the house-Smart features: thermostats are a given, but how about light fixtures, switches, aromatherapy, fans ... anything else?