So what you're thinking is a partial eat out plan...not eating out for a year would mean nothing on your table that didn't come from a grocery store to be cooked at home or brought with you from home to eat wherever you are going.
It would mean no pizza Tuesdays or eating out during travel and such.
Either you just want to cut down some and spend the money on other food instead of food that was prepared by someone else. You still have to eat, you'd just be buying groceries instead.
We think eating out is expensive and a waste of money, right?
Consider that your food costs money no matter where it comes from. And "I" matter. I deserve to not live in the kitchen either planning, prepping, cooking, or cleaning. I deserve to have time for me and not spend it entirely on my family.
Then at home who is responsible for the cooking? For planning it? For going to the store, walking the aisles, picking out all the ingredients, going back to the store for something that you forgot? Spending time cutting stuff up, mixing the ingredients, making sure it's made how your family will eat it, maybe even making an alternative for that one that won't eat dairy or glutton or some other thing, then you serve it and no one wants to eat it.
After spending all that time getting the meal from an idea in your mind to on the table now you have dishes to do. Who's responsible for the dishes AND kitchen clean up all the way from the cabinets to the floors and trash? Who gets to put those dishes away?
Then you get the utility bill. If you never washed dishes or cooked a meal how much less would they be? Natural gas, propane, or electricity make your hot water, run your appliances and clean your dishes. You have to buy liquid dish soap, dishwasher detergent, water softener additives, Comet, Brillo Pads, dishclothes, hand towels, and more just to have clean dishes from cooking.
So is eating out a waste of money? We use apps on our phones to the places we eat most. Such as Sonic. A kids meal is often on sale for $1.99. I can feed the kiddo and myself for less than $10. No dishes, no clean up, no mess. I toss the trash in the can at the exit so no mess in the car either.
IF we went out to sit down restaurants every meal it would be expensive. Figure out how much it would cost you to feed your family every meal out for a month. Then look at how much money you spend now on every meal, including the eat out meals, and see what the difference is.
Could you eat out less expensively? More than likely.
Could you eat healthier if you did everything at home? Yes, no question there.
So eating out, if we tried to eat at home every meal or take food with us when we're not at home and it's time to eat, I think that would be more expensive in the long term for me because we eat on the run a lot. My propane bill could double and it only serves the stove and our heating unit. The water is electric. Our electric is hundreds per month on the average monthly plan. If we cooked every meal it would shoot up too.
All in all you sound like you want to eat out less. If you don't mind the extra workload on yourself and being tied to the kitchen more and more then I think you should try it for a week, then a month, and by that time you should be able to see if you can stop eating out completely.
As for my household? No, we can't not eat out. We have a lifestyle that puts us in the car for hours every day and if I packed food in ice chests and then had to make stuff out of the trunk and then take it back in the house and toss what was left over I'd have a nasty cooler every day that would have to be sanitized. I'd rather eat a quick meal out and toss the trash.