1. TX National Guard is fine for defence, probably not suitable for occupation of foreign lands though.
2. (Laughs in Russian)
3. Anything they like, or multiple something's. Even USD if they're stupid. How would you stop them?
4. ...and so they issue some licences to people who want to start one. Its not like the skill set is rare.
5. And you'll pay your troops with more debt? Taking bets on who collapses first?
6. I'll believe that could happen if and when the Mexican government starts governing Mexico.
Won't happen because rich Texans have rich friends in other states, not because Texans couldn't do it.