They are very nice.. They come and take blood samples from your birds, generally I think 10%. I found it easy and straight forward. Contact the state vet's office to schedule: https://www.tn.gov/agriculture/news/2019/9/11/beaty-named-state-vet.html
:frow Hi there and welcome. I'm in Smith County.
You can get away with a half a square foot per bird for the first 3 weeks or so depending on the breed, but a foot is better and would give you more time before they have to go to their coop.
In middle TN with all the rocks I would suggest double steaks that's what I have and it's worked well. Also invest in a gate. I thought it silly at first but love it now. And if your terrain is anything like mine you'll need more posts.