Free sperm donor?

This may cause controversy... delete if not okay, I'm just genuinely curious.

Have any moms on here ever have a kid with someone for the sole purpose of having the kid? Like you agree to a certain amount of child support or no child support. You both agree to either coparent or single parenting if the dad doesn't want to be a dad, but you want a baby. It's basically like getting sperm from a sperm bank, but without the crazy cost of a sperm bank.

I've been contemplating it with a guy for a while, I just haven't brought up the topic. We hooked up once before long ago, and are chatting about meeting up and part of me wants to do the one night stand thing... but I don't want him to feel like he has an obligation to the child if that's what we agree to... am I making sense? Has anyone ever done this and got suggestions? Thanks in advance!! I'm just so curious because I've looked at sperm banks and the cheapest "vials" is over $800 and that's not including shipping and the special container to keep it the right temperature until you're ready to use it.

Sorry for the long post. Please let me know what you think, but also please keep it kind. 💙