When creating a domicile, the main factor is how many aircraft overnight there. None of our PNW bases have enough planes overnighting to really qualify.
I know the PNW sucks for commuters at SWA. It's one of the main reasons I have not moved back there.
BFI was a diversion to get what we wanted at SEA. It worked.
The real money to be made in Seattle lies in the underserved north side. Alaska is going to kill it out of PAE. Those who live on the north side of Seattle have a few bad choices when they fly. A potentially two hour drive and $25/day parking, catch the bus and light rail down, or try to go up to Bellingham. All of those suck. Paine is in a perfect location to capture a lot of business flying.