We had a KK for 6 years and loved it. With the full Annex set up there is heaps of undercover space to get out of the rain if staying somewhere for a bit longer.
As to whether or not you could live in the camper for two years - only you can make that decision.
I had a canvass bag made for all the walls etc, for the extended trips it lived on the roof tray so that it was out of the way, and I would only get it down if I was really made to.