with a view towards sustainability. 1 1/2 times the size of mine, before you add the loft. And at that price it had better be better made--I don't think that's cheap! After all the stirling engine generator is optional.
http://www.treehugger.com/files/2006/06/smaller_homes_b.php#comments
(http://www.treehugger.com/files/th_images/sustainplan-thumb.jpg)