You're free to marry anyone you want. As to the green card, that's an immigration question, so I'll pass it to that area.

You need to contact the embassy or consulate of the country you wish to visit and ask. Also, make sure that if you are under supervision or parole...

This is an immigration question. Pass to that area.

Personal income tax is due a number of years after renouncing a US citizenship, and even after that for the most part on any US assets. Property...

You need to hire an international business lawyer to not only explain, but help you set up your entity. International business is not for amateurs:...

This is an immigration question. Pass to that area.

You divorce attorney needs to make the proper interrogatories or deposition to get it out of him. If he lies, you will have to find a search...

This is a question for a British attorney. Hire one or contact the closest UK embassy or consulate.

Where? China? Chile? Zambia? You need o hire a lawyer in that jurisdiction, unless the [potential defendant has assets in the US.

You don't say what country; not all are the same.