I saw the pic. It appears to be at least 60 feet, and I guarantee you it has a carbon-footprint several orders of magnitude larger than my gas-powered Baja regardless of the solar panels and “alternative fuels”.
At second glance, probably more like 80 feet.
It looks like about an 80 foot houseboat.
Here is a link to a different almost new 80 footer. Check out the specs.
They are full of crap on it being a ‘prius’.
http://www.boatquest.com/Power/Sumerset/Category/Length/18698/Feet/USD/1/boats_specs.aspx
I was wrong. Here it is, it is 100 X 19. Pics included.
http://www.billaustinaircraft-yacht.com/2007fantasy/index.shtml