Being bilingual is quite useful if you make it to medical school, and I expect will also be useful if you make it to dental school.
If either medical school or dental school is a realistic possibility, then you need to budget for a full 8 years of university. You would be way, way better off if you can completely avoid debt for your bachelor’s degree.
One big problem with applying ED is that if you get in, then you need to withdraw your other applications. This means that you do not get to compare offers.
What does the NPC say for Northwestern? I would not apply ED unless the NPC is very optimistic in your case, and puts the likely cost at a level that would not require you to take on any loans nor rely on any additional outside scholarships.