A full can of soup is roughly 250300 calories . 1200 is the lowest safe calories for a small woman . 1400 is the lowest for a small man . That ' s I won ' t die and will have half way decent nutrition calories . Cans of soup are typically larger , but let ' s use that sizing for the cups to be conservative here . If you ate nothing but soup , that would require 45 soups a day . What else do you recommend eating ? Pouring the soup over rice ? Soups are great fill in meals when tightening the belt , but I see so many unhealthy recommendations on this sub . This guy doesn ' t have a ton of debts . He can probably solve it all with a simple budget . And you want him to have malnutrition to complete it in one month instead of two months ?