It runs in the commandline with minimal resources. If you bother to make the configuration file you can have it watch a folder for new torrent files like your download directory and then move completed downloads wherever you configure. So on one server I will have it download the file on a SSD and the move the finished download to a spinny drive. You can also have like ~30k torrents before the client starts to bottleneck but you can run concerent instances.

It also has a web client but I’ve never used it.