The cost of building materials are still high so ...

The house my family homesteaded Eastern Colorado in is made of sod. Layer upon layer of mother Earth. It's still standing but dilapidated, you can see it from I70 outside Genoa Colorado. Three generations lived in it.

My grandma wanted a window so my grandpa made one, and the grass on the pieces he removed started growing again when he laid em in the yard, after being in the wall for decades.