My wife is setting up a fitness studio and we need to sort out the audio solution.

Requirements:

iPad and Spotify to drive playlists Wireless Mic Individual audio control for Mic and iPad

I was initially thinking wireless and Sonos, as we have this going at home with Spotify at the moment, but not sure how to incorporate a microphone into a Sonos solution

Next, I was think of a simple wired solution with speakers on the ceiling. Just not sure how to get the audio out of the iPad and Mic and into the speakers. I assume I need an amp for the input and then output to the speakers, but not sure if this will give individual volume control for the two inputs. Do I need to add a mixer in as well?

How would you solve for this? What would you need?