My parents made their house self-sufficient. They have a water pump, filters, and a photovoltaic on the roof that can power the whole house and an EV. They’re planning on using the car‘s battery for the house once it’s too weak to drive. They also installed a wooden stovetop which heats the whole ground floor. As for food, my dad‘s a hunter and inherited way too much ammo for a single lifetime when my grandad passed.