They're just now suing someone? I've been skipping commercials for almost a decade now with MythTV... surprised it took this long.

No problem, just wanted to throw it in as an idea... I can say I've personally set up Digital Signage software as a method of mass deploying music to 100's of locations (hotel chain). It worked great, was fairly simple to maintain. But it can absolutely be it's own animal. Any way, I wish you the best of luck on the project, sorry I couldn't offer a solution that matched your needs exactly.

So... can you build a 5 story building? sure... have you personally done it by yourself? doubtful.... Having first hand knowledge of something, and knowing it can be done are not the same thing.. you're a complete idiot if you believe that you need to have done something to know it can be done. Like I said, stop trolling and offer some useful input.

Troll much?

First off, I've never done this with FOSS... That being said, I'm 100% certain it can be done..

You need to accept a couple of things when planning to do this with FOSS:
    Remote management can be done, but will require someone who understands the way you set it up
    You will probably be custom scripting when your playlists start (cron?)
    Updates will require manual playlist modification (goes back to understanding how you set it up)

For an amusement park, I think this is a bad idea... Not sure how big of an IT/Tech savvy staff this location has, but while they're looking to save a few dollars today, are they considering business continuity if you leave or if something happens to this custom system? are they planning to have regular backups done? are they planning for future expansion? etc...

My personal advice would be to avoid broadcast software (Way overpriced for this).... What would be more reasonable is digital signage software... it's designed to do this with audio and video, but you don't have to use the video portions (of course, consider that a future expansion option)... If you want to stick with linux based, I know ParkMedia has a decent setup... If you're willing to consider other (windows) options check into CoolSign.... Those are just 2 that I've used for similar setups, but there are tons of options in that field, that do what you want to do, with easy user interfaces for changing/moving stuff around, and the ability to remote manage them... Also they tend to work in a client server setup, so you back up the server regularly and if a client machine fails you just replace it.

Just my 2 cents, hope it helps.