On the subject of cheap microphones... I've placed one of those cheapo computer mics on the ground in front of the vocalist, cranked the gain of the pre, into one channel of a stereo delay then into a compressor, compressed to high hell (High rate, fast attack, fast release and a moderately low threshold) and back into the other channel of the delay, for added weirdness place a nice filter on the sidechain input of the compressor and run the drum tracks through, sweep around focussing on a specific frequency that gives you a rythmic groove you like.
Presto! Instant rythmic vocal drones and pure industrial nirvana.