As to potential dangerous situations for having a license, I guess it's possible, but I think unlikely.

Just make sure to 1) Charge a non-refundable pet deposit (we charge $250), 2) charge pet rent (we charge $25/month per pet, 3) Limit the number of pets (we set 3 as the maximum) and 4) not allow dangerous breeds of dogs. 

Dangerous  Neighborhood 3.

The rehab costs have far surpassed our budget due to some masked  issues(missing copper lines in walls, dangerous wiring almost throughout...all covered with sheetrock) Also, the city is requiring us to pour new approaches at "multifamily" thicknesses; about $9k worth. 

NO Candles,, that's just trying to mask odor and candles are dangerous.6.

The only reliable way to know if your home contains asbestos is to hire an environmental consulting firm or asbestos building inspector for asbestos testing. we all know that asbestos is extremely dangerous to our health so best to consult some pros for that. 

There is a balance of investment and danger that must be felt out.

My wife and I feel electric is more dangerous because the surface could be hot long after you turn it off and you are more likely to burn food because you cannot control the temperature as well.We see valid points on both sides of the argument so would like to know what you all have in your rentals and for what reasons?

This is dangerous advise to give to novice investors.

When it gets airborne then it's a danger.