If I remember right local HNA pilots get double pay for international flights.
I worked for a different HN group airline, BCA, and for the most part they run them the same. Being "based" somewhere means nothing. They will just deadhead you out of your base, and then you layover 3-4 nights out of another airport where you stay in a horrific dump, in the middle of nowhere.
If you are going to be "based" somewhere, you want it to be where you operate out of, and you will want to do one day trips.