Can anyone recommend a background support system for a 12ft wide space?

I have been looking at background support systems, and would love to buy one that would take up all of the 12ft wide wall, but I know that the tripod supports need space too, so I guess that will eat up some space. I guess my best bet would be a 10 x X system. So, does anyone have any recommendation on those? Also, out of curiousity, how much space does a 12ft system take up (in total width)?