But then any economy is gone, and costs go over conventional, as one has to custom cut and fit and bevel hundreds of pieces of materials for walls and roofs, with extra labor time and material wastage.
Windows too have to be special.
The resulting home, with a second floor mezzanine, is very beautiful, with an artistic owner who has used bright colors and art works throughout. But it didn't save money or materials. Both are touted as offering fabulous insulation. Both methods do allow for amateur owner involvement in construction, and have afficionados who will sometimes come volunteer in order to learn more about the techniques. In some places, straw is an agricultural waste product, which may be burned, I'm told, such as rice straw.