This is the Espace Mobile hailing from Salzburg, Austria. According to the website, the interior and exterior is fully customizable, with the shell made of spruce wood and aluminum metal sheeting. Like many pre-fabs, the price doesn’t include land, foundation, connection or set-up fees, or transportation. Nonetheless, it’s designed to be affordable, mobile, and environmentally friendly. I think all that depends on how you customize and specify construction. See fact sheet.
"F2" is short for "Flickr Friday," a weekly short posted on Friday with an image from Flickr and a quick description. Feel free to email me your F2 ideas.