you may want to get a hold of Mikey, in Black Forest, (east of Colorado Springs)
 They built a earthship and he has a lot of knowledge about how to build/maintain these types of homes.
 
 he has had a hand in building/designing a lot of the earthship type homes in the area. He may know about this one specifically.
 
 You may also be able to have him come and help inspect the potential new home and get his unbiased feedback/suggestions. 
 
 when we were debating building one, he was a HUGE help.
 we have been to his house, his neighbors earthship, as well as a few other in our area that he has helped with.
 
http://www.touchtheearthranch.com/rhome.htm
 
 
 I also have all of the earthship books. if you get serious, i would suggest you at least browse through the books to get an idea of how the house was designed/built.
 hope this helps.
 
 kelly
http://www.cloud9farms.com/ - Southern Colorado - Zone 5 (-19*f) - 5300ft elevation - 12in rainfall plus irrigation rights
Dairy cows, "hair" sheep, Kune Kune pigs, chickens, guineas and turkeys