if you are going to use Ethereum platform how long will that take to make a transfer via your system? Just average. Have you tested it yet? Ethereum has a problem with scalability and your plans include well populated areas. How are you going to handle huge traffic?
this is a problem we are acutely aware of. We are moving forward at the moment with ethereum, but we are wallet & blockchain agnostic and will be eventually moving to another one that will allow us to scale and transact quicker.