there's the whole "bare bottom is cleaner" debate but it's hard to get under the rocks in a bare bottom tank. You could run sand and siphon out 1/4 of the sand each water change and replace it with new stuff.
I agree on the zeovit and high-end skimmer. A fish only tank would be the best for the restaraunt because usually keeping coral is "elitist" and most of your customers will just wants to see really cool looking fish.
As for lighting I don't know if MH glitter lines will be distracting for customers or if they'll like it.
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Everything I put in my tank is fully dependant on me.
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