Cooking is my new hobby in lieu of being able to be really active and frankly, I'm probably breaking even given the cost of dining out. Especially when you think of money spent on cooking gadgets + good ingredients + cookbooks as incremental over the cost of what i'd be spending if i was just eating anyway (which is exceptionally difficult to do if you're trying to eat mostly vegetables and lean proteins). I just made carnitas out of a pork shoulder and i paired it with a brown rice pilaf. Together the mean was probably $3, but to get the same nutrition (and probably less delicious) i'd probably have to spend $10.
If you're willing to eat kind of boring food life gets even easier. Chicken and rice casserole in a crockpot takes 10 minutes to put together in the beginning of the day, costs very little.