Make money now.
Make kids later.
Having three kids of my own, I can tell you that the smartest thing my wife and I did was wait a few years after our marriage, to make money, establish careers, buy a house, THEN have kids. You two have already accomplished most of that, except the time together (being married), and establishing a career (though James has one).
Get yourself established first, enjoy the career you want (and finish school), then contemplate kids later. You have plenty of time.
Kind of reminds me of our conversations with Wayfast about having plenty of time to build a racecar... when he was still 14. Don't be in a hurry to jump into bigger responsibilities until you've enjoyed the more simple things in life (like freedom, friends, and money in the bank).
Thus endeth the lesson.
__________________
I USED TO HAVE an 85 Camaro 305 4bbl, 90 Firebird V6, 97 Firebird V6 (10 speakers!). Despite the two family vehicles, 3 kids, wife and mortgage, I can finally realize the dream - 88 TA almost all stock... for now.
http://www.cardomain.com/id/untameddave
Wanted this -

, but ended up with this -

for free. Can't argue with free.