We have the 5kw portable type. DH put it on a concrete pad, then built a little lean-to around it. It's about 12 ft away from the house, and well-ventilated, which is really important. What gives me pause about your situation is, the pull start on it is the same type as a walk-behind lawnmower. I can start it, but it's not super easy. Also, you have to add gasoline to it every __ hours. DH wired it into our house's circuit box, but he wrote me up a set of directions, because he used to travel for business all the time, and I couldn't remember exactly what order to do everything in. This cost us $500 for the generator, plus whatever an electrician would charge you to wire it.
On the other hand, some friends of ours have the large automatic generator that a pp described. It's autostart, but it's also $10,000. For that kind of money, I can pull a lawnmower cord for a looongg time!
Are you thinking of this for your summer home? We only lose power about 4-5 times a year. 4 times in teh winter, during a storm, and usually once in the summer. What made us get one was we lost power at Christmas, with a house full of guests, and a well/septic system. Not a good situation!
Anyway, generators are a popular theft item, so I'm wondering if you're sure you want one at a summer home. Mom and Dad got broken into several times, and the generator was always taken. If this is for your permanant home, disregard that last part.