SOTA-DOMUS are the cheapest with the highest standard of construction - why?

From the answers given so far, the answer to the considerable price advantage is self-evident! Extremely low material requirements Extremely fast construction Extremely durable No maintenance Passive house standard - extremely reduced energy costs Important - the required materials are outside the mainstream and therefore not subject to exorbitant price increases! SOTA-DOMUS high-end construction has never been cheaper!