I'm going say "definitely no". I have nothing against single mothers themselves (I'm male), but I'm bothered by an inordinate number of almost boastful-sounding statements "my kids always come first!" on dating sites. If one is a parent, kids coming first is common sense. If a woman feels the need to blatantly point that out, it makes me question her willingness to spend any time with me.
Also, while I don't know the whole story, how she ended up a single mother makes a big difference. If she is a widow is a divorcee, I have no problem whatsoever. Those things happen in today's society, and that's that. But if she's a single mother because she had a child with a pretty-boy jerk who sweet-talked her into intimacy, only to dump her afterwards, then it becomes an issue of carelessness. On top of that, I start to wonder if she's looking for a beta male to take care of her, financially and otherwise, after she made a bad decision and got intimate with an alpha male.
Just so no one accuses me of misogyny, here's another angle. If I decide start dating a single mother, it's inevitable that I'll develop a casual friendship/mentorship with her kid(s) or even become somewhat of an uncle figure. Then, if she dumps me, she'll get over it pretty quickly, and if not, I don't really care, because she chose to dump me in the first place. But the kid(s) will be hurt in the process, due to losing a person in their life who they might have enjoyed having conversations with.