A relatively simple batch script that automatically installs/updates/verifies the latest Arma 3 server, and selected mods (including symbolic link creation for easy start parameters, and key copying to the \keys\ folder), using SteamCMD.
Script must be edited before its first run to specify the SteamCMD path, server install path, Steam username (must be valid, but does not need to own Arma 3; "annonymous" cannot be used), and mods to download (if desired) using the easy to edit settings at the top of the file.
(A more advanced PowerShell version of this script that will actually check if mods are already up to date or not is currently in development...)