hopes to see them become commonplace in the third world.
Strange, because the frame alone costs $2,700 in the USA.
However, the frames can be made with no power tools. The
material is cheaper than dirt. (Pound for pound, compared to
potting soil.) Get a few folks who have time on their hands
and a bit of skill, and they could start a business.
Presumably they would be a lot less than $2,700 under those