You've asked some complicated questions. You probably want to talk to a tax lawyer that has experience in international tax. You might be a candidate for IC-DISC tax incentives depending on some other factors, which would greatly reduce your tax bill at the end of the day.
Jim Foster is considered a nationwide leader in this practice area - if you google his name and IC-DISC you can find some publications just to get a feel for his work product. Depending on where you are in Houston, his office is over by the Galleria.
There is NO attorney-client privilege based on this interaction. I am NOT your attorney. We have no signed engagement letter with a clear understanding regarding fees. Further, everything we both just wrote is publicly available on the internet and would be the same as if we were talking in a crowded restaurant, there are many witnesses looking over your shoulder and can repeat anything you write here. If you need legal assistance use Avvo to find a local attorney in your jurisdiction that you feel can best represent your interests as a zealous advocate. My experience is in corporate tax, white collar criminal defense, partnership tax, and tax controversy/litigation. If you're being audited by the IRS or state taxing authority, or you are taking an unusually risky tax position on a return, that is the kind of thing you should have experienced counsel on your side and we can set up an initial consultation. If you have a family law, debt collection, violent crime sort of issue then I do not handle that. Do not contact me for an initial consultation on non-tax matters.