I’m a Michigan alum. I would go to UW in a heartbeat.
You mentioned rainy/cloudy for most of the year. You do realize Michigan is rainy, then cloudy, then snowy and cold, right? I had a hard time adjusting to Michigan and I was from the Midwest. With you coming from CA (I’m there now), it will be a challenge at either place. At least Seattle isn’t freezing.
I think your job opportunities are better with a Finance degree than an Econ degree.
Save the $15K/year, apply the $60K total to an MBA program (if your parents will let you, or keep it), and go to UDub.
The cost difference is in UDub’s favor. Foster is known as a very good Finance school. The strong Michigan alumni network is totally overblown. It never really benefitted me in business.
@tsbna44 is correct. MBA programs care about your GPA and GMAT score, as well as your work experience. My Michigan degree helped, but so would a UW degree, especially in Finance, and if you get a better job with the Finance degree and still want an MBA, then your better work experience will help you with MBA admissions.