Wait they're ditching employing workers and you only want to charge them $5k a year per machine ?!
No no no …. what you do is called math.
How many hrs are they open?
Well then we take operating hrs and multiply it by the state/fed minimum wage and then multiply it by 365.25 (a year).
Now you've got a starting point for this Human Replacement Tax.
The revenue generate by this tax/fee should be split between training and taking care of the communities where these machines have replaced human labor.