T.N.
I hope you can find something to do from home that enables you to do what you "LOVE"--which is stay at home with your son. I love it as well. I'm just wanted to offer a different perspective. You said your fiancee doesn't make enough money to pay the bills, and so in addition to finding some job you can do mostly from home, can you think of a way to decrease your bills? The financial equation is both a matter of income and outgo. When my husband and I were in college the first year we were married we made only $13,000 taxable income combined, and so we were well within the poverty level. We just cut our expenses as much as possible so we could live within our means. We were not on welfare of any kind and did not go into any debt--we just learned to do without. It was extremely difficult, but definitely possible with discipline. And guess what, we were very happy even with our limited means. Things don't bring happiness. And we weren't stressed out financially because we always knew the bills would be paid due to our careful planning. It's really not about how much money you make, but how you manage it.
The little things do add up. Track your spending and expenses for a couple months and you'll most likely be surprised how much money is wasted (I was!) and you will see where you can cut back to save more. Making a budget and sticking with it was the only way my husband and I were able to make our money stretch to go where it needed to. Pay the crucial things first.
As for the the income part of the equation, would your employer let you work part-time so that you you're not as worn out when you get home and can still have plenty of energy and time to spend with your children? Also, a lot of people work from their home or on the side. Keep in mind that in order for anything to pay off, it will probably take time and effort, especially initially if you're going to do a home-based business. Do you have a special skill you could do? I am seriously considering becoming a professional organizer, because that is a talent and passion of mine. What skill do you have that could really be of use to others?
Maybe if you do have to work full-time you could do things like hire the housecleaning done to make one less thing you have to do at home that takes away from your time with your children. It's hard to find the balance between it all. Maybe it will help if you think of it from a long-term point of view.