About 6 months after he was born lol! We were (still are!) in the process of renovating so his room had no flooring or curtains. All his furniture was dismantled until a couple of days before we moved him in there. Until then he slept in with us. Because we were co sleeping it wasn't a big deal but I remember feeling very sorry for myself that I had no nursery to show off!

As long as they have somewhere to sleep and you have a place to store their clothes (even if that place is a box) nothing else matters. If you're moving soon I can understand why you'd want to wait.