(For comparison, I have 28GB of eBooks at the moment, as well as 164 GB of audiobooks. In retrospect, 20-30 is probably more than enough, but I'm still figuring our the room for metadata.

At some point, I'll dial them both down by half or more.

The processors almost never come into play. Currently giving the system 4GB of RAM, 4 processors, and 70 GB of space, NOT counting space for the library. Not sure if it matters, but I'm running it in a VM. I'm assuming a plain vanilla install of Debian that you've booted into once, updated packages, and rebooted if necessary. To get started, you need a Linux installation. Hopefully coming soon will be some short guides for things you'll encounter after the installation (why won't my audiobooks import, why aren't calibre entries being written, etc.) As well as an inevitable edit of this guide once all of the flaws and shortcomings have been located. And my choices are not always correct for me, let alone for you. I've tried to call out options where they are available and give some reasoning behind my choices. There are some things that should come in a certain order to make life easier. If you follow this, please read through the whole thing first. This is a more or less step by step guide to install. I know some of you want to run it in Docker, or on a Synology, or on Windows. Here's a guide to help you install a nice library suite on a Linux system.

Calibre web library configuration