yeah that's fine. i have food and water to last me 3 months. it's not the type of stuff I want to eat (classic emergency food that lasts for 30 years) but it's there. i also stock up on food regularly and i have a buffer where i could cook 2-3-4 weeks out of food that has a reasonable shelf life (think flour).
but this is just to absorb small bump. and i think it technically is called an emergency plan, not prepping.