Thanks a lot, Phil. That's a good piece of advice.
The Authorize.net was just an example where we felt like we couldn't relate to everyone else in the industry when searching for a solution for that problem. Now, we've solved that and "replaced" Authorize.net for one of the european companies that do pretty much the same.
So, my post wasn't focused on that specific problem, but on incorporating in the US, mostly because that's where our clients are and if doing it on Delaware would allow us to save a lot on taxes: great ;)
So, the company we have in Portugal could even not relate to the one we would create in the US, by now it is just the common umbrella under which we're been doing business (both client work and that specific product I've mentioned).