Server/VPS/Bandwidth Requirements to run Airtime

Hello,
Just looked at the Airtime demo. It is great! Cheers!

Can anyone explain what would be the bandwidth requirements to run Airtime?
(say for a simple radio with 1000 listeners )

Can we use it in a VPS? Which VPS service do you recommend to host Airtime?
Any minimum configurations required?

Thanks and Regards
prad