Has San Diego ponied up for a new stadium yet? If not, then going to the City of Industry would make more sense.
NFL is always going to have a tough time in the South, where SEC Football is king. Most fans in places like Atlanta, Charlotte, Jacksonville are bandwagoners, who will turn out if the team is good, but if not, plenty of empty seats.
L.A. football boosters here from mexicans to blacks to everyone follow the Raiders more than the Chargers, based on my conversations. And no, they havent ponied up the dough...yet or seriously.
I'm originally from Maryland where Redskins are kings but since I've relocated to the South, I've made friends and some of them just have lukewarm interest toward NFL. If you talk college football with them, well you don't want to start because you'll be up all night talking with them.