I'd like to know what the coop looks like so I know what I'm dealing with. 3 - 4 hens now but do you plan to integrate any chicks or chickens later? Will you have a broody hen raise chicks, either getting fertile eggs for her to hatch or getting day-old chicks for her? How I'd outfit a coop would depend a lot on my plans for down the road. But let's stay with 3 to 4 hens.
For a coop you need roosts, ventilation and probably a nest. Some people have nests somewhere other than where they sleep but it's easier if the nests are accessible from the coop. A way to get out of the coop into the run is a good thing, probably a pop door. That is all a coop needs.
Are you feeding or watering inside or out or both? Where you feed and/or water can have a big influence on what it can look like. Still, there are an unbelievably huge numbers of different feeders and waterers that work, whether you buy them or make them yourself.
You can see how I make my feeders in this photo. I take a free plastic bucket and cut 2-1/2" diameter holes in it for their heads. I've used this as a waterer in emergency situation. I don't necessarily recommend it as the handle will eventually break but it is free.
I've used a lot of different things for waterers. This is what I mostly use currently. A black bowl in winter so the sun helps keep the water thawed but white in summer to help keep it a bit cooler. I cut a hole to fit in plywood and raise it above the ground or bedding so they don't scratch trash in it. I also have one set up on a cinder block. These need to be dumped daily. The chickens will poop in it plus I don't want a mosquito breeding pot of water.
Without knowing what your coop/run look like I can;t make any recommendations. Most importantly there are all kinds of ways to feed and water, inside the coop and out. In Georgia you should not have much to worry about with freezing water. That makes it easier.
