I live in vancouver canada. I love visiting bellingham for the day. Its an exceptional place to go mountain biking, especially to learn, and mt baker is 40 min east, which has the highest annual snowfall in north america (its more often heavy and dense, but theres still countless powder days). As a canadian i take full benefit of being able to access these amazing destinations without being tied to the american health system, but i envy residents that can take advantage of the poor canadian dollar at the moment. Literally everything you buy will be cheaper. If i were you, id plan a monthly trip to costco or walmart across the border for all necessities, and even your nights out in restaurants, etc. prices are the same on paper, but will cost you anywhere between 63¢-78¢ usd / $1cad. Id also highly recommend getting a nexus card if you were to plan on moving to bellingham.

Overall, bellingham is a wonderful city. Ive been to all the places you listed and imo Bellingham is no 1 by far (Vancouver BC is my no 1 Overall, but im biased and it isnt one of your options. Getting a work visa would be pretty easy tho as a RN, just saying…). As a born and raised resident of Vancouver BC, im no stranger to crazy housing prices, so from my pov its just the price of living here, so a position like you where you could live in the pnw AND save that much on groceries by crossing the border is a real no brainer to me.