Yes, it's always best to have things set up before you get the animals.My goal currently is to have the brooder, coop, and feeding/watering systems in place before bringing them home.

Call your vet and ask if they treat chickens. The answer is usually no.I'm also wondering if I should be looking into a certain kind of vet for chickens other than the one we use for our cats and dogs.
You can call every vet in the area and ask, and you might get lucky, but most vets just will not treat chickens.
Chickens are usually pretty healthy, so most of them never need a vet.
A few of the most common problems can be treated at home (examples: coccidiosis is treated with a readily available medicine, and injuries to a chicken's comb can bleed heavily but usually heal fine on their own).
For more serious problems, my personal solution is a sharp hatchet: behead the chicken, then decide whether to eat it or bury it. The beloved hen who was badly injured by a predator got a nice burial, but the escape artist and the bully made tasty chicken soup

Chicken coops certainly can smell, but that's not good for the chickens either.I've heard it said that chicken coops smell and it has been advised to keep the coop away from the house or immediate backyard, but there is a perfect spot under our almond tree right outside our backdoor that I think they would love, and if I'm correct, I think properly maintaining the coop should keep smells at bay?
Yes, it is possible to avoid smells with good design and good management.