We used solar and a compost toilet and a very small septic for the gray water. Super easy. It was for my she shed. I guess I am very lucky to live in my part of Indiana. We live in the country and the building inspector was fascinated by our design. He even spent hours with us learning all he could about earthbag houses. We have round barns all over the place here so people really liked the round look. Earthbag homes are popping up all around me. Mostly thanks to the inspector. He also volunteers with the winterization project and Holmes for humanity. We did have dcs out here twice. But they just wanted to ask some questions. No biggie. They never even opened a case.