Back on topic:
Everyone will disagree with me, but here goes..
Only eat microwave meals
I have dinner for $1 a night.
Go to Walmart and load up your cart with "Banquet" etc. Some are even less than $1.
And apart from cutlery, there's no dishwashing!
Cooking fresh food and vegetables for yourself is overrated. Gotta buy all the ingredients and spend all the time cooking.
I don't have a study to back me up, but I think microwave meals are cheaper than cooking.
Yes, I'm a single guy :-)