Here is an interesting new prefab from Clayton Homes.  I believe there factory is near Sacromento, you might want to take a tour if your in the area.

 

We love this prefab home because it’s extremely energy efficient and affordable coming in at under $75,000 for the smaller model and under $94,000 for the larger model. Clayton Homes, the largest manufacturers of mobile homes in the U.S., recently released this high tech green home that is far removed from your standard trailer park dwelling.

See full article.