It might take most of the day for the kitchen to get done. The kids come in to help after about a half hour of hard core playing, but they're surprisingly good helpers for their age and size, and are completely comfortable climbing around on countertops and such to get at all the corners.
When they are done, Justin has a working kitchen! At least if the Applehills teach him to cook. With a nice large grill, there are plenty of easy things he can learn to make - omelets, pancakes, hashbrowns, grilled cheese sandwiches, and the like.
The deep fat fryer is probably not salvageable though. Oil left sitting around that long tends to turn to varnish. Probably just as well. Heating up that much oil to cook for one person would be rather wasteful, and Justin is not the type of person to waste anything, ever.