the easy't answer is if you need to know the price you cannot afford it !
honestly no idea , i only use it
so long as you have an extremley fast machine or workstation , gig's of ram and can allow 3 minutes for it to load you'll be ok .
here's a start , base and slides for router , it's in a vrml file or grab a veiwer from
http://www.parallelgraphics.com/products/cortona/