Dont currently have anything built im just thinking about designs for this spring.
I work at a ski area, we have two outhouses that are in need of replacing. I would like to do something like the trash can poopers. Was just hanging up on urine flow. Most of their use is in winter. They are both pretty remote, one has no close power.
Delivering hot water could be done in small amounts, a thermos full would do it I think. Dont know about maintaining a compost pile. We usually have 3 feet of snow by December. Insulation on hose and a somewhat insulated structure may help too.