Okay, so apparently there are popularized versions of what I want to make called “scrolling banner stands” for trade shows. (Here - http://www.nwcidisplays.com/displays/banner-stands/index-scrolling-banner-stands.html )
I just want something smaller, more lightweight, and sideways. Also, trying to look up anything about something scrolling is stupid difficult because it’s always about websites and java and crap.
I’m still interested in building my own, so I’m just going to try and figure it out and possible destroy some thrift store printer or something in the process.