Running two 2X2 video wall

Hello everybody

I would love to know what is the best and most affordable solution for driving two 2X2 video walls - each one contains four 46" full hdmi monitors with dvi / hdmi inputs

It is not for gaming or design programs - Just running full HD mp4 videos on each one of the video walls full screen

Will combining two 4 outputs video cards(each one for 2x2 video wall) will be the best solution?

 

Thanks a lot