For six week olds, I think that roost may be a bit high, hard to say from the pic. We usually leave the feeder and waterer inside the coop, but they're free to come and go so they have access to it at all times. I think when it gets hotter it might be more important to have more water sources available. I've always read that nesting boxes should generally be lower than roosts. We've been using five gallon buckets with part of the lid cut out laid on their sides on the ground, chooks seem to like it fine.
Awesome! We're hoping to have some broodies at some point.