Texas is a Net Payer state: Texas pays more to the federal government than it gets back.
https://www.moneytips.com/is-your-state-a-net-payer-or-a-net-taker/356
Texas also has no state personal income tax, so it is easy to simply discontinue taxpayer federal returns and begin Texas state returns to keep their own money in-state.
Every state should have an emergency plan to go it alone or in a regional group of states anyway. To not have a Texit type plan is a measure of gross neglect and incompetence by governors and state lawmakers.
It could be a very viable economy.
They can deport all the illegals.
Old people will leave for states where they can get Medicare coverage and there will be a surplus of cheap housing.