A cool design would be a greenhouse going up a hill with a composter going down one side or both sides. Fresh material could be dumped in the top and finished compost taken out the bottom. A “continuous” composter. Also the greenhouse could create a warm draft at the top and that draft could be used for heating a house, shop, studio, drying food, etc. Ive long wanted to live on a site with a hill and use gravity and convection.