In my university there are lots of student computers with quite good hardware and also remotely available.
It’s easy to just download blender on each machine and start blender via ssh and command line (https://docs.blender.org/manual/en/dev/advanced/command_line/arguments.html) on a multitude of machines each rendering different frames. (30 computers -> 30 times faster)
Unfortunately my artistic skills are much worse than my technical prowess. Rendering is no problem but my lamp scene still looks really boring…