No need to do the US incorporation anymore really
Most of the US banks are not taking on any new applications because they are being fined so heavily from visa for going over their percentages.
If you decide to go with a merchant account feel free to hit me up, I can place people from any country at great rates (6.5-7.5% depending on specifics) and many times without incorporating and application costs!
I'm here to talk if you want .. hit me up
