It actually cheaper to eat out for both lunch and diner every day. The food industry has so screwed everything up eating out is cheaper than making your own.
Depends on what you cook.
I can cook pasta, rice, or potato dishes with meat and vegetables cooked as part of the dish and make 20 quarts at a time really cheap. You just need freezer space and you feed a family of two for a week and a half on thirty dollars. Make three of those dishes and the lack of variety is tolerable as long as you keep fruits and chips or crackers around. Probably sweets for people who eat desserts.
Not hardly.
On what planet?