There are cheeper solutions for this..... €139 and thats the price witouth pedals, just the box.. Pedals are at least €50 each...
Have a look at the behringer 1010 or the yamaha MFC10 if you want to have great pedals... Or the Korg EC5 which adds 5 switches to your pa3 or 4x
http://www.thomann.de/nl/behringer_fcb_1010.htm Its only €149... And works very very well