You’ll stop spending your money on other things once you have the kid, so it sorta balances out. For example, the wife and I loved going out with friends on the weekend, that obviously stopped and made us realize how much we were spending doing that before
Daycare around rural Iowa for us is about 500 a month but that’s only 4 days a week. So once you have found out you’re pregnant just start looking for daycares to hold a spot (if you’re going to go that route).
I’d agree with the diapers convo above, that cost piles up, but subscribing helps. Formula also is pretty pricey, if you can find it right now. Just starting out with the first kid is expensive because you have to start from ground up. So make sure you get on a registry and hope there’s some that will buy the big ticket items!
Good luck and don’t get disheartened if your Wife doesn’t get pregnant right away! My wife is due with our second daughter this Friday. 2 kids will be an adventure lol.