>>1354557*cough cough* let me interrupt, my family were potato farmers in eastern Europe, so I am qualified to answer this. You can grow and live on potatoes easily (though it would be rather difficult forcing yourself to eat it every day) and depending on specifics of your location/climate it might be slightly easier or harder than my area which is hot and dry in the summers meaning a lot of watering so a river needs to be close by. Potatoes can store well for almost an entire year in a cold dark cellar like we had.