I was like the lady who didn't want to marry until I met my husband, who is truly special, and married at the age of 28. When we had children I stayed home until they started school/preschool. I'm glad I could (for my own sake more than for the children's! I loved the time with them.), but I know many mothers cannot do this. When they went to school, I was fortunate to be able to go back to my career. My husband has always "helped." I now have two daughters-in-law. One works outside the home. The other stays at home, although she is taking some college classes online. Both are fine mothers, and I'm so fortunate my sons had the good judgment to marry them. I think it must be harder for the single mother who must work. My son's job is closer to home, so he starts dinner before his working wife gets home. I'm proud of the many ways he makes himself a partner. A single mom has to do this herself. It requires more effort, but I've seen it done successfully.
My other son doesn't help as much, mainly because his wife is such a perfectionist that she gets things done before he gets home. I tell her to begin to train him to help, because if she goes to work when the kids are in school she will want him to pitch in.
In short, don't get married just to be married. As a single mom, consider your children before you consider marriage. If you marry, do what's best for you and your marriage and children. God knows my heart (I'm a pastor's wife, in fact.) and He knows what I need and what I can do. I know a number of single mothers who have managed to provide a happy home for their children and to be happy themselves. Most of them do try to provide a masculine influence, maybe a grandfather or a good man who is willing to be involved, to show the children what to expect from a good man who cares for them. There is no Biblical law about working or not working (See Proverbs 31).