Well the big problem for you is that directv hasn't agreed to carry P12 network yet. If it does, it would likely be just the national channel, but who knows. If Directv were to pick up the P12 Network, it would be on a more basic tier (same as ESPN, FX, etc) and wouldn't require a sports pack at all. It definitely won't be a channel you can order alone on from any cable/satellite provider.
Who is your local cable company and would you consider moving your business over to them if Directv doesn't choose to pick up the network?
It's still relatively early on, but I don't see that the SoCal channel will be all that SoCal centric... a little yes, but the football content will be national for the most part. And if you don't mind watching on a computer or can connect a computer to your TV, the streaming will be available for all content from all regions.