For a quick and dirty clean room run the shower really hot for a few minutes to make a bunch of steam and then wait for the humidity to naturally equalize, boom you got a few minutes to do your swap job.
I’ve never heard of this… what’s the idea behind it? That you get the RH near 100%, and any dust particles will be a nucleation point for water to condense on, causing them to literally rain out of the air?
Seconding Plex / Plexamp if the use case involves streaming remotely. Probably the easiest to get up and running for remote access.
I’m not sure about the capabilities of hosting on a Pi, but it should be straightforward to run a couple different apps in parallel to test and compare features (I’m currently doing exactly that with Plex and Jellyfin)