"pictures you're seeing are for a house that cost $135k" yet "Smith says they have priced materials for these homes, each under 550 square feet, at Home Depot

"pictures you're seeing are for a house that cost $135k" yet "Smith says they have priced materials for these homes, each under 550 square feet, at Home Depot, at about $13,000." So it would be nice if they had detailed the real costs. As indicated, the material cost is relatively insignificant.