Hi, I'm planning on building an A-frame coop with the bottom half being the run and top being the coop. I live in Nebraska and I'm wondering how to deal with the weather extremities here. My husband wants to have the ventilation be limited to the peak of the roof- it'd be 8ft long by a half ft or so wide. Am I right that's not enough? Keep in mind NE has 90°+ humid summers. I was thinking of also having both small sides be vented. Also, considering NE can get fairly cold in winter, do I need insulation? I don't think so since my families in the area don't have it, but they also heat the coops, which I was hoping to avoid. Thoughts?