Depending on how comfortable you are with modifying your Cloud, You can actuall have your NAS download the torrents directly to itself allowing you to turn off your computer without interrupting the downloads.
I followed both
http://community.wd.com/t5/WD-My-Cloud/Guide-Rtorrent-Rutorrent/td-p/696992
and
http://community.wd.com/t5/WD-My-Cloud/GUIDE-Transmission-2-82/m-p/619597/highlight/true#M1322
I had better luck using the transmission link myself. Also the tutorials are done in such a way that copy and paste works perfectly fine. Very little knowledge needed just need to follow the directions step by step.
