I have done this to my minitruck, but mine was paint.
I have never seen a wrap, seems like there is too many chances of it peeling up on corners, or if someone dings the wrap to hard, it might look like a chipped bumper sticker. But then again I see alot of RV's and cars with advertisements done pretty well.
Cool idea though I guess if done right and awesome material used. Prob would look killer on a Bu! Mad max/darth vader look. So easy to clean I bet !
I do think paint might be cheaper and last longer if done right. I mean $499 might be the same as paint, but I am no expert. When I did my mini truck, black mat/hot rod satin black only cost me under $100 and thats doing it myself, just borrowed a gun and compressor. Just have to figure materials. But I am sure you want it done clean and right, mine was kinda ghetto lol ! Just my 2cents