I can’t speak for WA, but in my experience, it would be extremely difficult to do.
First of all, I’m not sure how you’re going to jumpseat on a commercial flight, because you don’t work for the airline. Secondly, fatigue wise, I think you’d be setting yourself up for a very tiring commute and it will burn you out in no time. Especially when some of the bases only see 1-2 flights a day, if that.