I probably would do as many ones as fives. I do get the mechanics of small NL games do not require as many ones, but each dealer should probably be carrying a rack in their tray to make sure they can always make change for players, and dealers should never be making change from their toke boxes so a lot of singles are just going to sit there for an entire shift.
Not to mention if you do get into 3/6 or 4/8 limit games, that would probably require a minimum of 3 racks per player to get to a "never run out" situation. If you don't do this, maybe running on 3K-4K singles is comfortable.
Also #TeamBlueDollar
Yeah, but this might cause a headache and screw over good customers that just keep $100 chips instead of cashing them out. Just because you don't have to do something, doesn't make it a bad idea for the sake of the business.