VPS or Virtual Private Server is a remote machine offered by an internet hosting service. Typically these services provide fast internet, high security, and reliability in uptime - great for running a validator. This is kind of like a middle ground option - you are still running your own validator, but you’re doing it on someone else’s hardware so all of the costs associated with the upkeep of hardware, electricity, etc, are bundled into a monthly fee. This is a great option if your electricity bills are high or you don’t have hardware resources you can dedicate to running a validator at home.