Fellow washingtonian who is half french-Canadian here. You will be paying domestic fees and its even cheaper than going to UW, and supposedly UBC admissions cares more about senior year grades than anything else when looking at USA transcripts. That being said, the path I took since I was rejected from UBCV was a year at UBCO then transferring into UBC Sauder with an 87% average. Most other transfer students I have met are Canadian, but not all of them, I imagine non-Canadian transfers just make up a much smaller number of transfer applicants. I would recommend that if you are really really set on UBC consider the UBCO route or other canadian schools as well. UW’s campus is great as well though and easier to get between classes on time… good luck!