Need help setting up 3560 cisco switch

hey guys I bought two 3560 cisco swiches and a rack. I'm confused on how I would wire the console port to my PC that is a few rooms apart.

My PC does not have a serial port. I was looking thinking of getting one of these but obv that is not long enough. rj45 cable is not a problem as I can get some for free from my job.

http://www.amazon.com/TRENDnet-TU-S9-USB-Serial-Converter/dp/B0007T27H8/ref=sr_1_2?s=pc&ie=UTF8&qid=1438385959&sr=1-2&keywords=usb+to+serial