My only caveat with meal planning is you have to remember if you are suddenly having to do everything by manual labor, your "serving size" may fall way short of what you and your people are going to need. Even if you say "I've got lots of fluffiness to offset things" that may not be the best way to work your numbers, however you count them up.
I counted calories for a long time but left things like sugar and the calories in my flavoring mixes, gravies, etc. out of it. I also left out the calories of bagged flour.
Your average, moderately active adult male needs a minimum of 2000 calories per day just NOT lose weight and that's assuming he is starting off at a healthy weight with decent muscle tone. Get even down to 1980 calories per day in the same male and he could wind up ten pounds plus lighter in less than three months. Stress, fatigue, and new manual labor chores means his calorie intake needs to be closer to 3000 per day in order not to lose weight precipitously which would not be good for his health and well-being.
Male adolescents? Don't even get me started. Same for female adolescents.
Then there are types of calories you need. Rice, pastas, and other types of carbs can add a lot of calories but they don't exactly add to your health especially if you are already dealing with health conditions such as diabetes. "Healthy" and "plant-based" items look good until you really start looking at some of the nutrition on those items.
I know people plan on gardening to help with nutrition, calories, and servings for their food stores but lets be honest, if you aren't doing it now it will take at least a season or two to learning and get a garden up and running. And that is a lot of manual labor. One of the reasons you shouldn't plan on living on forage alone is because you expend more calories than you can bring in.
Green beans is a good example of having to balance things out. Green beans are good. They're nutritious, You can even get them in cans and low sodium. They are one of the easiest veggies to dehydrate and then use at a later date and have them taste like a quality product. And they are great for weight loss ... 34 calories per serving, maybe less if you steam them without seasoning them. Low in fats and carbs if cooked without fats/oils. See
Calories in Green Beans
for nutrition break down.
A man would need to eat a freak ton of green beans to keep his calorie intake up enough to stave off unhealthy weight loss.
When I had to change our diets for various reasons ... mostly my own Type 2 diagnosis ... my food storage changed pretty radically. I've struggled to get the calorie intake/food storage back up for the family in general. I still have rice, quinoa (yuck, bird seed texture), pastas, and flour in my storage plan but it will be more for my family than me. I still have soups in my storage plan but I've been forced to lose some that used to provide lots of calories (potato soups as an example). Speaking of potatoes, that's another carb/starch that I've had to minimize for myself while keeping some for my family's use so there went the instant mashed potatoes, etc.