It's not an Airstream of course, but it is pretty darn cute IMHO...& the tow vehicle to match!!! WOW!
As far as a toilet is concerned, from their website
Restroom: All Twisters come with a portable toilet in itís own restroom area. This is a self-contained flushing toilet. The beauty of a portable toilet is that it is more convenient and sanitary than holding tanks. Lightweight, no messy pipes or hoses.
Besides, you probably wouldn't full-time in something like this, nor do we in our GlobeTrotter...so anywhere you would tent-camp you could stay just as easily & in more comfort. I guess I'm not against "roughing it" in style!
Bottomline: I'm a camper...not an RV'er I suppose.