When do you start buying stroller and carrier?

Haha i got it only after my bb is out. I thot aiya she wouldn't go out except for checkups only. So i didn't get pram or stroller initially. But try carrying 3kg baby for 2 hours, we (me, husband, helper) take turns to carry its still alright. But when Lo got heavier it proved to be a challenge. 😂 So i end up getting doona car seat stroller n preown tula- explore in mesh material. My sis pass me her ergo360. Tula for my helper n ergo for my husb. Now my bb is nearly 8kg at 5.5mo, these carriers n stroller r a great help man. Even my husb who's a burly muscle man finds it hard to carry her for long (if it's without e ergo).