You will almost never see Charlotte before you are forced to upgrade at PSA. It takes over a year to hold a line in Charlotte and you’ll be forced to upgrade at about 18 months. That forced upgrade will put you in a random outstation base doing 5am hot reserve in Norfolk, Dayton, or somewhere expensive like DCA.
When you upgrade at psa it will be over 3years to try and hold a line in Charlotte. Also the lines in Charlotte are shrinking due to expansion in other bases.
I would consider endeavor or gojets before coming to psa.