Can anyone please tell me, which is the best option for configuration and how we should go about using the shoutCast service for live streaming to an audience of around 60.000-70.000 listeners?

Current situation:
We have nothing setup, no servers, but we have listeners from a radio station that is locally-based. So we need a ground-up description of what/how we should start.

Firstly is it possible? Having in mind that we might need to use a huge amount of relayed servers (my understanding).

Can anyone please help us out?

If something is unclear, please tell me which additional details I should explain.