I'll add a few things that hopefully aren't duplication of what has been said:
You are contemplating bringing a child into the world even though the baseline condition for life is unbearable suffering (Jordan Peterson paraphrase). The risks and probabilities of particular types of suffering that are being contemplated on this thread are, at best, icing on the cake of the certitude of suffering. MMM doesn't tend to phrase things so harshly, so this may come out of left field for this crowd, but we all know that existence includes (and in fact IS) suffering. It's the natural cross-product of consciousness and vulnerability/mortality. Bummer.
Point two is my standard refrain as a child produced by a non-accidental, incorrect choice by my parents, and the intentional mother of child with no father. My parents' marriage was over when they conceived me, and my older sister had/had multiple significant disabilities that entirely consumed my mother and "ruined" life for many adjacent parties. My son was conceived when I was married to a woman, but she bounced during the pregnancy (week ONE, actually). When contemplating the pregnancy back then, I boiled it down to the actual decision at hand: will a given child be born or not. I was not trying to decide if having a father was better than not, or was "essential", or even if it was "fair" to a child to conceive them, knowing they would have this particular flavor of painful suffering. We were deciding if it was worth being born into the given circumstances, or not. See point one, and you'll agree that it's logically worth it to be born. I certainly feel grateful that my parents made the selfish decision to have me. I cannot come down on the side of "my life is not worth living" because of my absent father, suffering mother, crisis-ridden sister, or anything else frankly. I trust my own child to do the same. And I'm right at the crux of deciding to try for another - now to be born into a single-mom family, not two-mom family, and I trust that child would feel the same.
Is single parenting hard? Obviously. Also partnered parenting. I think money makes an incredible amount of difference. In the U.S., the median income for a single mother is about $27,000, which is not livable without mustachian prowess. As much as money doens't buy happiness, poverty definitely underlies many particular forms of suffering.
Now for something I'm actually curious about: what are you doing 20 hours a week for exercise?!?!?!