Interesting... but I'd be afraid to sit on it. The TP's a nice touch.
Nice integration of the toilets, My only nitpick is the perspective on the toilet paper that is flying free, if it were going off into the trees it would be getting smaller not larger, and the two background scenes you used dont blend very well at the merge points.
Changed toilet paper and there's only one image used in the background scene, it's a golf course in Oahu. Also arms have been changed to beer kegs and bud cans. He's a golf course beer dispensing port-a-potty, cause after all you really only rent the beer.