Would it be a bad idea to have kids with my friends with benefits?

I’m 28 and my friends with benefits is 34 We’ve known each other for 10 years, get along really well, and have never argued. I already have one child, and he has five. I’ve always wanted more kids but planned to wait until marriage or finding “the one” After several failed relationships, I’m starting to feel like that may not happen, and I’m aware that I don’t want to have children too late in life.

I’m considering having a child with him, knowing from the start that we’d only co-parent and not pursue a romantic relationship. He’s a good father to his kids, and I’m financially stable enough to raise the child on my own if needed. Would it be a bad idea?
Would it be a bad idea to have kids with my friends with benefits?
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