You can run the showers on the outside too, although I'm not convinced that's a Canada tested solution.
With Outside Van you supply the van and their builds can get up to +$150k in stuff. Crazy, crazy money but nice to see what could be if money wasn't an option.
I'm just not convinced the behemoth of a vehicle fits what I really like to do. I love camping at the top of FSRs and although a 4x4 Sprinter is a capable vehicle I can think of a few times I'd be trying to turn around compared to sneaking through with my Taco.