Forgetting macro/micro and focusing on calories, using a cheap food source, I'd need 0.75 metric tonnes of oats to do this, for 4 people. Probably doable for $7

Forgetting macro/micro and focusing on calories, using a cheap food source, I'd need 0.75 metric tonnes of oats to do this, for 4 people. Probably doable for $750 say, I am guessing at a bulk price. Most years I'd need to chuck it. Probably could slim down and live off half that. Or 500 cal/day for adults with more for the kids. It is survival situation after all.