Ed works for a company who uses Motorola Android phones, and the 80 year old security guard can't use the small keyboard and has not been a computer user at all. He'll need something to check the security cameras if the alarm system goes off. Ed was thinking about possibly getting an iPad Mini.
Leo says that since the images are addressable on the web, a Mini would be a good solution - unless those images are posted in Flash. iOS doesn't support flash natively. If he's used to Android, then the Google Nexus 7 is an option. Any tablet that supports 3G or 4G.
Another option is the Samsung Galaxy Note II, which would also work as a phone for him.