Take my advice, do NOT brood chicks and ducks together. The ducks need water deep enough to put their whole face and head into it, for starters. Ducks are messy, wet and nasty brooders and will trample chicks and soak them down. You can get by for a while for 3 in a 50 qt storage tub and clean it frequently. You could also use a rabbit cage and make sure you empty it every couple of days. In a month you should be able to move them outside providing we don't get that crazy late winter garbage creeping into May. They won't need as much heat after a few days as chicks do either. You are really biting off a good lesson as a beginner, aren't you? LOL You will also want to consider letting the two species have their own separate areas with that many. Ducks can be brutal on chickens. Ducks will try to mate with ANYthing (Hey Ralphie, maybe you need a couple of ducks for Bert of the ladies of the chicken persuasion don't work out), and that means other drakes if there are no ducks around. Good luck. It sounds like you have your hands full!