Yes you can provide better rates than Bitcoin ATM but how can you say no KYC? It should be regulated and registered before start doing it as per the laws in most corner of the world then obviously AML policies of your country will certainly need KYC and proof for the source of money coming in and has to be reported to the appropriate authority.

Or maybe you can run it in a small scale and not following anything but still its against laws and that is actually the black market.