I have researched them. But unfortunately there are sustainability issues with them, humidty, pest, FIRE, and the cost of upkeep. The cheapest and probably most sustainable SBH I have seen was just shy of $40K. Stucco was added to help increase the sustainability.
No no no. Study more
~~McKinsey~~
"Men have forgotten this truth," said the fox. "But you must not forget it. You become responsible, forever, for what you have tamed."
~The Little Prince; Antoine de Saint Exupery