Of course, you will need to pay for the cameras themselves, which can be fairly expensive depending on the type of features and level of sophistication you are after. But that is a one time expense. I thought it was very interesting and informative about the new wireless security cameras that allow you to view footage from a secure site on the web. This seems like some advanced level system that I would have seen on a crime show or something, but it seems that this top of the line technology is now making it out to the general market. The best feature of this, from my perspective, is that I could watch the footage from wherever I may be in the world– inside the home, at work, or on vacation– and be able to monitor how things are going at different locations around my home. Plus, since the camera would only be activated under certain conditions, I do not need to waste time poring through blank footage of my yard, for example. This is great news. I also liked the discussion of the technical differences between different types of camera, most of which was new to me. Something interesting, however, is that the article shows how it may be a little older than expected by the discussion of cathode ray tubes. This is important information, but I am not sure how relevant it is anymore considering that all televisions these days are digital. That does not necessarily mean that surveillance cameras do not still operate these days using cathode ray tubes, so I am not sure.