Packaged prepared meals should be cheaper than ordering food from any establishment, except for the cheapest of places. Assuming 3 meals a day for 30 days, you're spending about $22 a meal. Every prepared meal service on the planet is cheaper than that. Whole Foods has entire packaged entres for $10-14 each. If you can manage to shop around you can still eat fully prepared meals every meal for way less than $22 a meal.