Replying to Organising a group ski trip

Planning on organising a group ski trip this year for (hopefully) around 25 people, wondering any tips you guys have or things you think need to be considered. Obviously been on group ski trips but only from the "consumer" side and never the organiser side.

Would be a very wide range of abilities from complete beginners to experienced, and nightlife would be a pretty important aspect

Also this would be happening in Australia lol