How many beacons for a floor of 1250 square meters with ~ 2m accuracy


How many beacon should i setup in a factory with 1250 spare meters (please see the image below)
My expect accuracy is 2 meters, there are some machines inside with not too much worker (less than 20 worker).
I’m thinking of setup 1 beacon for each 3 meters on each wall (totally 50 beacons)

Do i need setup some more beacon on some fix-position machine with position lower chest-height to increase accuracy ? Or just mount them in factory’s wall only ?