Helical piles are long (tens of feet long) screws that attach a structure to the ground. They work in some ground but not in harder ground (caliche) or softer ground. In other words, they can work about 20-33% of the time. The rest of the time they are unable to adequately anchor a bulding to the ground.
They lack a foundation. This also means the lack of a solid plumb and level surface. While that seams cheaper, there still needs to be a reference surface which IS plumb and level, so there we go adding that back into the project, and the same carbon footprint and cost comes right back up.
There's no "easy fix" to "the housing market" and while it would be nice to creat a magic house that just "screwed into the dirt", neither the house nor the dirt are cooperating.
What a waste of time. But hey, let's get investors. Because we can all get rich. On this worthless scam.