Trouble is OP, right now, you'll only be able to listen to your hormones 
I have 3. Yes you'd cope, yes you'll love them all, yes it's do-able.
My goodness you get stretched though. Picture yourself as pastry; the more kids you have, the thinner and thinner you get rolled out. Everyone needs a piece of you, and they all want the largest.
It's not the bigger car, or the bigger buggy, or the paying for 3 entry tickets on days out.
It's as they get bigger. 1 wants to do Art club but the other has violin and the youngest can't be left with anyone. 1 is sick but you still have 2 others who are not, and then they all fall ill in succession? When you want/need to get back to work? Even if you're ok with camping/travel lodge holidays, because holidays don't cater for 2 + 3, the logistics of trying to please everyone and give each child enough time and the ability to pursue their own interests and hobbies gets harder and harder.
Realistically though, people only really appreciate how much easier having 2 was when they've got 3.