If 718g lasts a week, then that's 100g per day, or 3.5 ounces of food per day. That's even less likely.

There are 1600 calories per pound of dried beans (https://modernsurvivalblog.com/survival-kitchen/calories-per...) 3.5 oz would contain 350 calories.

The average person needs 2,000 to 2,500 calories per day. No, this guy isn't living on 350 calories per day.

You're right about that. I add whatever vegetables and greens and fruit we have excess of, things from our farm share that my family doesn't like, and some things I buy for myself (beets, mainly). I add some olive oil, but am really trying to follow my doctor's advice about treating GERD and not have too much fat (I'm not opposed, otherwise, and would be thoroughly omnivorous if I didn't have this acid reflux. I've messed around with fasting but aside from occasional skipped meals and ending eating at least three hours before sleep I don't do that anymore).

This is a lot of bulk and water, so I can eat for a half-hour and feel full and hydrated for hours, but I do get hungry in the evenings when it's best I don't eat too much.

I could benefit from losing 10-20 pounds, but I'm holding steady eating like this, so I'm probably getting those 2,000 - 2,500 calories a day (I'm much less physically active than I used to be). Using smaller bowls, not snacking, and making meals more of a ritual rather than an indulgence might be helpful in reducing total consumption, slowly rather than precipitously. I do like the taste of these one-pot sprout-based meals, as it's a way to exercise control over my environment. That search for control may well be part of the problem.

My local grocery store sells a 4 pound bag of dried beans for $10 or so, which seems kind of high. Amazon basic beans are $1.50 a pound or so.

But he's buying bulk coop beans, so it's cheaper? All the bulk coop beans I can find online are actually more expensive, like $3-$5 a pound.

You're correct, I did my math wrong. It's more like $3/week.