You have found yourself trapped by today's economy. The rental in Oregon can only be a business expense if you are there temporarily. From what you describe you are not.
For now you are an Oregon resident and your wife is a California resident. The moving expense is deductible for you.
You and your wife will file joint for federal and separate for California. You will file in Oregon and she will file in California.
Licensing for the firearm is an expense of obtaining new employment. Job search expenses are deductible. So keep track of your efforts to seek employment in CA. That can make some or all of the mileage from Oregon to CA deductible job search expense.
I would have your Employer change your residence to the Oregon address for the time being. It would be beneficial to you tax wise.
Good luck with the job change.