[tor-relays] relay on a vps not exclusively used for tor?

Hi, I'm planning to get myself a small VPS for simple things like calendar-synching and backup of important data. Since these things are very light on resource-usage, I thought about putting a tor relay (non-exit) on the server, so it does something useful instead of idling most of the time. Is this advisable, or are there reasons why I shouldn't put a relay on a server that is used simultaneously by other things? Thanks for your advice!