Buy New DVR or Get a TV Capture Card?

I want to be able to watch CNBC in my office at home, something my wife doesn’t want anything to do with. In addition, I’d like to record my favorite programs for convient viewing. We have a DVR in the living room - Is there any way I can get that signal to my office wirelessly or would it be more economical to just spend the $100 for another DVR and have a dedicated cable right in to my office?

Thanks in advance for any help!