The project is based on the advanced Earthbag technology (using Big Bag bags is much faster) as well as the hobbit's house - heat and sound insulation by the ground and a light roof on a frame. Thanks to this combination, fast and cheap construction, durability, low cost of operation - no need to repair external walls and roof, as well as savings on heating and air conditioning. If you add a little cement to the ground, you will get a stone house for almost nothing
Many rammed earth (that is, just like this one - built from earth) houses built hundreds of years ago are still in good condition
Due to its low construction and operating costs and durability, the project is well suited for homeless and low-income people
In Russia, the cost of construction starts from 10 dollars per m2 (for self-construction, excluding finishing and foundation - in this case bags of earth or stone buried in the ground are also used as a foundation.)
The durability of the house is 100 years or more
Also an important advantage is the high level of security, which is relevant in our turbulent times (sandbags or earth are used by the military and police to build fortifications)
A similar concept is used in bulk gabions (for example HESCO bastion).
But my option is much cheaper