I've done one video shop. All the equipment was solid-state, no moving parts so no noise if it were to stop. My DVR for audio shops is same way. All electronic so no moving parts to make noise.
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Have PV-500 & willing to travel.
"Answers are easy. It's asking the right questions which is hard." (The Fourth Doctor, The Face of Evil, 1977)
"Somedays you're the pigeon, somedays you're the statue.” J. Andrew Taylor
"I have never met a man so ignorant that I couldn't learn something from him." Galileo Galilei