a very good idea, but in any case you need a development team, an investor, and connections with the ATM BCM!
Bitcoin is decentralized and the government has nothing to do with bitcoin and they may not allow you to install ATM in your city. The big problem is the users if there is no user in your city then installing ATM will not be a good idea. Users are mandatory to use ATM for their transactions. I would like to advise you to invest in bitcoin besides installing an ATM in your city. You will make more money from your investment.