I have 2 kids, but never thought of linking the concept of having /# of kids to personal finances.
any tips/fun stories on tactfully bringing up FIRE without sounding too uppity when meeting people who don't think it can be done?
In real life, I don't discuss FIRE at all, except with close family, and I have to even temper that a bit. Many who aren't following this path interpret some form of judgment -- whether it is intentional or not. I think it's better to live the way you want to live by example and when people ask, you can provide it then.