I am a teacher in a public school with a limited budget. Our community has bought 50 iPads for the students coming up next year, but did not budget anything for a cart. The administration has tasked me with solving the issue on the cheap and I seek your help. The requirements are: Preferably, it's mobile. It needs to be locked. This can be a simple padlock with a latch. My colleagues hope to have two carts of 25 each, but three carts of 20 each (with some empty slots, obviously) is okay. They have not told me if needs to power AND sync, or just power. At present the cart they have only powers them up. For IPad accessories, what's in the box is what I have. My school is looking to do this very cheaply--a simple box with a power strip inside is preferable than a big cash outlay, but I'd like to do better than that. I certainly don't want to spend the year dealing with small issues that come up with middle school students being unable to do this or that. I have thought of using a two drawer filing cabinet (top for iPads, bottom for the guts) and a 24 USB port hub with AC adapter. But I could make a box out of wood, too. I know it needs ventilation, but ideas on this end are appreciated. I tinker and build but my tech knowledge hits a wall, which is why I'm looking to crowdsource this to success. Thanks in advance.