The working poor deserve to be healthy, strong and happy. Eat as well as you possibly can. Stay as healthy as you can. Above all, live to fight another day towards a better life for you and your children.
Like most people who do a lot of their work at home, I frequently live amid chaos -- phones ringing, emails binging and someone always popping up at my study door, telling me so-and-so is calling just as someone has arrived for a meeting! It can often be overwhelming.
It can be confusing and daunting at first, but familiarizing yourself with the nutrition content of the food you're putting into your body will help you really learn about different nutrients and encourage you to make better choices.
While buying all of your groceries at a store like Whole Foods could potentially break the bank (I love you, WF, and visit your establishment at least once a week, but you are crazy expensive), there are other, less costly options.
I would eat something "healthy" and then stress that I wasn't losing weight. I'd steal a cookie off the tray someone brought into work and berate myself for the rest of the day. And I'd ask myself the question: If I have to eat to survive, why does it make me feel so terrible?