I tripped across this outstanding civil war era layout on Youtube- Very nicely done and very different from what most of us model. Check it out. Let’s take a trip to the Western and Atlantic Railroad in 1863! - YouTube
This layout was in Model Railroader a few years ago. The W&R Yonah is available as a 3D printed model, I ran across this website when I was getting into 3D printing a few years ago: http://www.ottgalleries.com/OSLocoKits.html I can't tell if this specific model is on the layout in the video, but there are a lot of similar modified Bachmann 4-4-0 models here. The new redesigned 4-4-0 with sound is tempting just as a fun model to mess around with. It's surprising how small those old locomotives are compared to modern stuff.