When do u guys start buying stroller, baby cot, and whatever is needed?

The most important one would actually be the baby cot which I bought in 3rd trimester. Other miscellaneous living necessities also during the same time. As for stroller, or carrier I think that can wait. Some babies don't like being in strollers or carriers. So you could actually bring your baby for a trial run before you commit as those can be considered big ticket items.