A big problem with generators is fuel. You would need to have enough fuel (safely stored) to last through the worst emergency that you felt was likely to befall you. Another problem is mechanical failure. If you only use the generator once in a while, it can be very prone to breakdown or at least very tough starts. The carbon monoxide the machine is putting out can be a hazard, so keep your generator outside and away from open windows. Also, did you know that generators can catch on fire? I had one light up on the porch of my house once. I have never picked up something so big, and thrown it so far, in my life. A burning piece of machinery can really crank your adrenaline.