Ask HN: Authorize.net for non-US company

Ok, need some good advice with this.

Part of my new startup is some sorta marketplace where i will need to be able to charge clients using something like authorize.net and make payouts to sellers.

I had too bad experience with PayPal before so I am not going to go that way again. So I am going to use Authorize.net with merchant account. As I am non US citizen what is the easiest way to to incorporate in US and get merchant account? I am sure that someone here did something like that before. Thanks in advance!