“Constructing an earthbag home is considered by many to be the most inexpensive method of building a home simply because the material is free and usually already onsite. The major cost associated with earthbag homes are the bags used to hold the earth which makes up the structure. The most common type of bags used are solid-weave polypropylene. These bags typically hold rice and grain during shipment and can be reused for building an earthbag home. You can of course buy the bags new as well.
It’s possible that an earthbag home could be used for folks interested in living small. With the proper amount of planning an earthbag home can be comfortable and last a very long time. When the home has reached its shelf life, it can simply be returned to the earth or the material can be used for the next earthbag home to be built.”
Source: Tiny Earthbag Homes