Re: Co-sleeping or separate rooms
The 7 year old and the 3 year old each slleps in their own room. Your eldest one slept with us till he was 4, from then on, he was moved to a toddler bed in our room and then eventually at age 5 to his own room. That taught us a lesson and our daughter slept with us (periodically in the bassinet and bed all night, and then the bed when she outgrew the bassinet) btill she was 16 months old and then her dad assembled the crib in her room, we put a sippy cup in her crib and after a week of crying she settled down. We still have 2 baby monitors that we use and do go and look at her and sometimes even bring her back with us if she cries.
The earlier the better I would say.