This problem was brought up in another landlord forum, the landlord dealt with it by disguising the cameras in smoke alarms, fire extinguisher boxes and exit signs.  

No Pets, No Smoking, Section8, etc. 

You want to change the parking rules, or late fees, or smoking, or anything - 30 days notice.And, tenants can't hold you hostage ever, knowing you can't kick them out until the end of the lease - or at least without major hassle.  

People can look years older than their age due to smoking and other poor environmental situations.

It doesn't have to be Secret Service clearance, but you should have at the very least a set of written policies (no smoking, no pets, cut the grass, whatever) about the unit, an application & credit/background check policy (minimum income level, employment, etc), an eviction policy, and a maintenance policy.

I told him I wouldn't pay because at closing I was asked if there were smoke alarms in each unit because if not they seller would have to give me an additional concession of $250.  

So maybe some new tech there but I would be surprised.I would even put yeast down the toilet every time I changed the batteries in the smoke detectors. 

Anyway, within a few minutes, smoke was pouring out and filled the air.

The biggest risk is not really from a physical damage, but more of a "pet smell" like smoking, that would cost you a new paint job or carpet (although a 80 lb lab could shred hardwood floors, to). 

The house actually is laid out where it can easily accommodate the 14, the halls are 4' wide, there are two stairways that are pretty open, the house has over 20 windows that open and are at a height so that someone could escape to the roof or onto the covered porch, ladders for throwing out a window, hard wired smoke detectors, etc.