Carrie and Elisia had a dream of getting back to nature and getting off the grid. Environmentalists to the core, they decided to build their dream with their own two hands on 6 acres in West Virginia. Using mostly used and recycled materials--including earth-filled tires for a foundation and newspapers-turned-papercrete--they turned the mobile home pictured above, which they acquired for free, into the home pictured below. Total cost of construction: $10K.
Their inspiring story can be read at Built from Trash, which includes many more pictures and instructions detailing the process. And for a unique overview, check out their 'Power Point' presentation of the project too.