StealthĀ ā¢Ā 5m
People will accept this no doubt and you should start working on this side by side as a part time research. Create small number of prototype and also create blue print for mass production so in future you can start this instantly but for now 2-3 years its seems like there is very less opportunity and if you really want to work on this then you can directly import vending machines from China and test this in Indian market for customer behaviour data.
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