We are nearing completion of our Rock and cob home. We were told you cant do that! They were wrong. Our budget ran out so we looked at what resources were around us. We have built a rock/cob decagon home. We have a tree in the middle and terracotta cob for our internal walls. cost to date 35k. All is recycled items from steel ibeams, granite and mahogony kitchen. Cob floors. I love my home. Highly recommend building this way but oh it is extreemly hard work. We purchased a bobcat and concrete mixer which made things so much easier. importing foundational building products can increase build costs excessively, but in saying this if you must it is very rewarding and dont compromise on your desired end result.