For clear evidence, you may want to consider an air quality monitor specifically noted for detecting a range of smoke types.

Nobody monitors or enforces it, but you should understand this before jumping in.

Consider remote monitoring tools (like security cameras), and budget an extra 10-15% for surprises.

Neither camera is capable of turning toward the house to view anything going on inside the residence.I am a remote landlord and wanted the cameras as a security measure to protect the exterior as well as monitor what goes on when outdoor vendors are at the property. 

Planning for potential infrastructure issues is essential, especially when dealing with properties that may need upgrades like connecting to city utilities.

I used to have a Minute sensor (for noise monitoring) in a unit located in a rough part of town, and guests would simply take it down.

Actually for me it is an upside to have indivdual systems so you can monitor tenant behaviors. 

BP also uses volunteer moderators (people with Hollywood good looks and keen intellect, such as myself) with little training or monitoring.

2) Property Preservation: as the owner you have the right to protect your property - even during an eviction. 3) Monitoring Utilities: you should have been receiving the water bills.

Otherwise, if you prefer not to go through that process, you'll be hit with a 25% tax on your rental income, which can eat into your profits.I also recommend investing in a couple of cameras and a good smart lock for security and monitoring.