Are you only looking for huge unicorn-like examples?
I founded and bootstrapped a startup the year my 3rd child was born and exited it (for a life-changing amount) about 4 years later.
Doing something before you have kids may mean that you have more actual time, but once you have kids you are also older, with more relevant industry experience and wisdom. Also, becoming a parent often makes a person more efficient, better at time management and prioritization. Parenting is the ultimate crash-course in adulting.
I founded and bootstrapped a startup the year my 3rd child was born and exited it (for a life-changing amount) about 4 years later.
Doing something before you have kids may mean that you have more actual time, but once you have kids you are also older, with more relevant industry experience and wisdom. Also, becoming a parent often makes a person more efficient, better at time management and prioritization. Parenting is the ultimate crash-course in adulting.