The lack of a stable home forces you to adapt to your circumstances and sometimes adopt less than ideal practices. When you don’t have regular access to cooking appliances and proper food storage you rely on prepackaged, processed food, A LOT. With limited financial resources your primary concern is that foodstuffs are cheap, plentiful, available and most importantly, filling.
Some cheap snacks consumed (a whole lot of these):
Whatever keeps you going eh?
-Water Bill Blues