I think PeaceHealth might start slightly lower than places in Portland, but not by too much from a cursory glance. Looks like they will hire ADNs (BSN preferred, of course) and new grads.
And what oceanblue52
said about income tax vs sales tax was my point about getting a job/living in vancouver. If you work in oregon, regardless of where you live, you'll have to pay income tax on salary earned in oregon, and we have, like, the second or third highest income tax in the country. Washington, on the other hand, has no income tax, but is in the top five highest in the country for sales tax. So folks who live and work in vancouver are able to take advantage of lower rents and no income tax, and hop the river to portland to buy consumer goods sales tax-free.
You still haven't defined what living comfortably means to you, though. For my spouse and me, living comfortably means having a house with a garden, paying off our debts, and becoming financially independent so we can pursue the types of work that are more meaningful to us than just a paycheck*. My spouse works, so we have two incomes and no kids, but based on the way we spend/save money, we have been able to buy a house in the [inner] Portland market and pay off my student loans (after about 1.5 years of her working in her career and less than a year of me working in nursing). If she lost/quit her job, we'd still be able to afford our mortgage and expenses on my salary alone, we just wouldn't be able to save as much. It's more important to us to save and build our wealth now than go out all the time or have the newest technology, so while we do travel and go out to eat from time to time, we do it on the cheap and take as much advantage of free entertainment as we can (eg. the pnw is BEAUTIFUL and has amazing hiking options). Other than our mortgage and one measly student loan from her undergrad, we're debt-free and plan to keep it that way, even as I pursue grad school. But if living comfortably for you means sending your kid to private school, taking multiple huge vacations each year, buying a mcmansion, driving a BMW, and continuing your education, well...it might not be doable on a single nursing salary without incurring lots of debt.
*I think that nursing (and my spouse's career, for that matter) is a meaningful job in general, but there are specific types of nursing serving specific communities that I want to pursue that don't always pay as well as working in a hospital with the general public.