Cheap fast food costs about twice as much as good homemade food. If you are very price-sensitive at the grocery store, you can make homemade for a third or a quarter of the cost of fast food. But, fresh fruits and vegetables can be a lot more expensive. Carrots, oranges, and bananas are cheap near me, but broccoli and bell peppers are hugely expensive (like at least $1 or $2 per pound of broccoli and $1 per large bell pepper). And don't get me started on the 'designer' apples (Fuji, Jazz, etc). Those things are crazy expensive.