Please, for Christ's sake, just leave. Have the plebiscite. Take it to Congress. Let them release you on the condition that all Americans in Texas be allowed to emigrate, fully compensated, and all wannabe Texans are allowed to immigrate, fully compensated, for the next 6 months.
Oh, and we keep the military equipment. I'm sure their 'well-regulated militia' will be enough for them.
Not 80s-90s era 'nation building', 40s era reconstruction. If nazi germany is salvageable we can probably figure texas out with the correct level of commitment.