The problem with this article is that a lot of things that are cheap for one serving go stale before you eat the second. For instance, on day one, he adds some mint which cost ~50p to buy, but he calls 1p because he only eats a little. He does not eat the rest of the mint that week, so it cost him ~50p, i.e. half the days budget. I am poor and eat very cheap. I do that using dry bulk foods and frozen veg. This is imp…
If someone else is paying utilities (say, your local university, or your landlord), and you already own kitchen equipment (say, hand-me-downs from your mum) perhaps this is a reasonable assumption. But for those who are actually in poverty, the upfront capital cost of cooking tools and the hidden costs of energy in cooking might be prohibitively expensive.
That said, cooking in bulk is indeed cheaper. So if you're trying to conserve, it might help to find two or three good friends and cook your meals together.