Until you are 24 or married or a miitary veteran you are a dependent of your mother for financial aid purposes.
As long as you are a financial aid dependent of your mother, your state of residence is wherever your mother lives.
Google EFC formula 2019, and you will get a link to the PDF of the FAFSA formula. Print it out. Work through it with several different scenarios to see what kind of federal aid you will qualify for.
Most places do not give any aid other than the federal aid. That means that most places will gap you, and you will have to pay a lot more than just your EFC.
Your most affordable option is to take this gap semester to look at places in NC. If you like them, apply there. If you don’t see anything you like yet, extend your time off so that you can keep looking for places that you like and that are affordable.