Hello,

I believe that you may be over-complicating this a little. Typically, you need to have either citizenship or some other legal presence within a country to open a checking account within it. I would recommend establishing accounts in your own country first and then using ATMs in other countries to withdraw money, as "wiring" money internationally can be expensive. If you just need to pay for expenses while abroad, look instead into using credit cards that have no foreign transactions fees such as the Capital One Venture Card. If you really need accounts in multiple countries, you will likely need to incorporate within them.

As for accepting payments in different currencies. Your best bet will probably be 2Checkout or Stripe Atlas to start. Stripe Atlas will probably have lower fees but will take more technical expertise to get up and running. Best of luck to you!