They do get BIG really quick and the do make a huge mess, but keeping them all warm, safe and comfortable is what it is all about. I say go for it too, you have plenty of space and you will prob. have 50% roos to cull. The big mess will just be motivation for the coop to get finished quicker. Enjoy your chick shopping, and yep, you'll love all the chicken soup you may end up with..............I think I'll start a pot now. YUM.