You are making an effort to eat cheaply. Clearly it can be done. I think most people will lose the $2/person/meal lunch budget because they aren't willing to eat a can of sardines every day forever, and I think $4 is (a) a noticeably cheap dinner and (b) more expensive than some takeout meals portioned appropriately.
Also: a glass of half and half? Really? I get the milk carb thing, but why not just drink something with no carbs or fat?
It's more about convenience and I what I like, actually. No real effort to each cheap. I like eggs and I like whole fat dairy. And in truth I do often eat cod or flank steak or whatever, so up the daily cost by maybe 50%, but it's still peanuts compared to eating out.
> a glass of half and half? Really?
I go through half a stick of butter, a glass or two of half&half, and some whole fat yogurt daily. First, it's delicious. Second, dairy fat is frickn diesel. You can run on all cylinders for ages.
If you control for portion size (instead of just eating what the fast food chains give you), your meal plan is just barely cheaper than Domino's Pizza, Chipotle Burritos, Subway Footlongs, and Wendy's Spicy Chicken Nuggets value meals (and those come with not one but three different kinds of peppers and savory spices).
I agree, don't eat Wendy's (it will also kill you), and I salute you for operating almost entirely on dairy fat, but I think my point stands: it isn't necessarily or even likely cheaper to cook than to eat out.
To be fair, if you're comparing against McD's, you're comparing the cheapest foods available on both sides. You have a point that the costs tend to converge on the low end, so if your primary metric is cost it doesn't matter so much. However, when you get past fast food to the mid-range, your average dinner entre at a restaurant is going to be at least $10, while the home-cooked meal is going to be like $5.
For food of the same quality, cooking at home is cheaper. The absolute minimum cost of either food is comparable (corollary: there is worse fast food available than you could cook yourself).
Also: a glass of half and half? Really? I get the milk carb thing, but why not just drink something with no carbs or fat?