NC Giants - we just had a pole barn built a few months ago and I'm going to be adding pens/runs in this winter and into the spring, and moving my Giants & other chooks over in the summer. My recommendation is plenty of room in the outdoor run.....they need room to exercise, and they'll be in excellent show condition with room inside & outside. If you have blues or whites & are concerned about sunlight, you can put opaque panels over the outdoor portion of their runs - that's my plan, a man a few hours south of me who is a big breeder uses them and has good results with feathers not fading. My roosts for the Giants are 18" - I don't want them higher, as they are such heavy birds, I don't want them to injur a leg/foot when hopping down in the mornings. Other than that, good nest boxes (I'm going to put rollout nest boxes so the eggs will be as clean as possible).
ChickwannaB - I am in Michigant (near Flint) - if this is close enough, shoot me a PM.