A few years ago I discovered Volpin Props and the amazing blueprints he's done of some of his builds. A bit later I discovered those put out by Punished Props as well as a handful of other makers on Etsy who sell them to allow you to create your own scale builds. After all this time, I still haven't created my own so it seemed a fitting challenge.
There are any number of free or paid programs available to do this and I've linked one below. However, I'm going to be using the tutorial from Alvaro Guzman to use Photoshop and an stl file. Check out these freebies from Punished Props for inspiration, too!