Qurstion for co-sleeping mamas!

Our 12w old currently sleeps in our room with us. My husband asked today when we were going to transition to his crib in his room. I asked why he wanted to do this now and he said that it seems like the normal thing to do. Part of me is ready and part of me isn't. I'm not so worried about normal or not. I'm curious when the right time is. He sleeps through the night about 4 or 5 days a week. Down to sleep around 10pm and up around 5:30am to eat then right back to sleep until about 7:30am. I want to do the transition with minimal trauma to both baby and grown ups. How long did your little ones sleep in the same room? And how do we transition?