Go with Kiosk Enclosures (Score 3, Informative)

I used to make kiosks for museums and other public areas. Do not underestimate how much abuse these things get from the public. I would highly recommend researching kiosk enclosures and ensuring that the hardware, touch screen and pc, will fit in whatever enclosure suits your needs best. Our kiosks were constantly moved around. Access to ethernet wasn't always an option so we often went wireless. Many times we would develop software so that it stored all content locally on the kiosk. We would create an admin program that would push any content changes to the devices. The devices were then able to run even if the network/internet went down. It also gives you a speed boost since you aren't streaming 20 video feeds across ethernet/wireless. Try finding a local interactive media company that has kiosk experience. It will save you headaches in the long run, even if you only pay them to meet with you once or twice to hash out your ideas and ask for recommendations.