So you're the Mom who moves the 18year old kid from bedroom in house to apartment over garage, haha.... Actually that's me!! It's a long process. First I moved chicks from house to garage, to coop. Then a few years later I moved chicks from Garage to coop. Now a lot of years later I just put them in the coop brooder from the beginning.
My kid however, came home from College and I built him a mini-house. You can only go as fast as your Mom heart will allow!! Your chicks are so cute! Have Fun!!