Suppose that I acquired the rights to run a little booth in a theme park for selling ice creams to kids. I cannot run my business if I don't have the machine that makes ice cream, so I buy one of these machines and start earning money.
I am not the "manufacturer" of the machine, I probably got it from a "reseller". What word describes the fact that I use this machine to run my business? I am looking for more specific word that "final user". (I am looking for the equivalent of the French word "exploitant", if this helps)