EDIT - You can't build your own ASIC rig either
Why can't I build my own ASIC rig?
ASIC = Application Specific Integrated Circuit - Because it takes a special ASIC chip. Can you design and build a CPU chip?
And how could I build a good non-asic mining rig?
Click
HERE Plenty of forum posts on that already too.
And where could I buy a non-ASIC miner?
Dunno