Planning pregancy

My boyfriend and I are both 21. We have talked about having a baby. What are the thoughts and pros and cons about being unmarried and young.. We both know the responsiblies, have a house, vehicles and financial stable.
​When he mentioned to his dad we were thinking about it he didn't give negative feedback as far as your to young, wait ect. (He was a young parent himself) He said your never financial ready because there can always be unexpected things with me, baby or even having multiples.
​Thoughts please! :)