You really need to get on a 48 Hour Film team. In the two day contest (on different weekends, in cities worldwide), the general scheme is a kickoff on Friday evening, where each team gets a genre (comedy, drama, scifi, about 15 total) and the three required elements. They have to turn in a 4-7 minute video two days later, Sunday evening. Generally, they write the story/script Friday evening, shoot the video Saturday, then edit and add the sound/music/effects Saturday night (all night) and into Sunday, when they burn the final video and deliver it to the dropoff meeting (there is a last 10 second countdown). Then drink.

You fit into the Friday evening story/script session. 99+% of the teams do live action - here is a "Making Of" for the one live action team I was on:

https://www.youtube.com/watch?v=Vd7Hvn4FtQg

Your idea for steampunk musical instruments I find especially appealing. Have you seen this:

https://www.youtube.com/watch?v=F7tMuUekYQA