First Projekt, many Questions

Hi Guys,
we are planning a project with around 40 participants. Parallel to the 40 participants, spectators should also be able to follow the session. We want to rent a server. The question is which bandwidth / hardware do we need. After a little research I read that most of the work has to be done by the video bridge. We’d like to put everything on one VM. is that still acceptable on this scale?
My thoughts are currently in the direction of Dedicated S. https://alfahosting.de/root-server-mieten/
Thank you for your tips
greetings