My sister needed a new coop, got tired of waiting for hubby, and ordered a really nice shed with windows and a front porch. 8'x12' i think $79 a month for four years. She said it was a couple hundred down and would not give hubby a heart attach. And she ha enough left over from her monthly retirement check to build a good 12 x 24 run.You could check with a shed builder to order a pre-built. Should be a few thousand less.
Or have your builder build the frame but leave off any wire, then add the hardware cloth yourselves. Shop around for the best price of big rolls of it (we were getting 100' x 4' of 19-guage 1/2" for $130 last year) Buy a bunch of screws and washers, good shears to cut the wire, an impact drill, and go to town!
E. TN has all the predators. Chicken wire might not let you sleep well at night.
Edited to add: echoing what others said to get more quotes. Always a good idea to get 3 quotes! Things are expensive, but that's an awfully high price.
And you're right that it'll take forever to make the math workYou're not just housing them; you're feeding them, taking them to the occasional vet visit, upgrading fencing and predator proofing...but the real rewards aren't financial. Same with pretty much everything to do with homesteading. The costs of establishing a homestead are stunning and were even pre-pandemic.
It was a good move to start with 7! Seems like a lot of first-timers dive in with 25+ chicks before realizing how big they get and how much room chickens truly need to stay healthy. Healthy chickens = happy you.