Of course there would be logistical shit to work out. Do you think we would just one day go, "Welp, I'm out." and walk off? It would take some serious planning. But, it is absolutely doable.
Planning?
I am talking about real world issues, what happens to all of the people who lost their jobs from this latest energy crash.
You can't have a sustainable flourishing nation that is built upon a volatile thing like oil and gas.
What happens to your job when colleges don't have access to federal funds?
What percentage of you departments budget is federal?
What happens if Mexico decides they want to take Texas back who is paying for a Texas military?
You do know your taxes would be much higher to pay for all of this.