It is a fair question and one only you and your family can answer. We find ourselves in a similar situation though with different schools and major.
In our situation, dream school is a direct program entry year one with many small classes and field work immediately. Very good and would be fine school has 2 years of gen ed and larger but not necessarily huge classes. Dream school has dedicated advisor day one and better support services for ADHD. Very good school has offerings but it would be student driven versus a lot more early oversight.
Grad rates are better at dream school as are early year internships and research but at the upper levels they equal out a bit.
From an academic standpoint we all lean towards dream school setting my S on the best path for success early on. With his ADHD it could make a huge difference. But it comes at a price and one we haven’t quite decided is worth it. We’ve offered a similar deal, matching the student federal loans with loans of our own.
That amount of loan for us doesn’t worry me, given our ages job security income retirement funds equity etc. It is a short term funding supplement (due to cash funding a chunk of the older two) that would be paid off early. I figure it’s the car I never bought him to be honest.
For my S, it’s doable but yes could be tight for a few years and it is possible dream school may command a slightly higher starting salary though it may keep him from his dream work cities in the short term from a networking standpoint.
If we can we would help him pay it off. It is likely that we can but I’m not telling him that.
I managed to pay off my own student loans (which would be about 18k in today’s dollars) within about 3 years with focused effort and my S has a similar discipline if he wants something badly enough (though 3 is unrealistic in his case). I’m not opposed to skin in the game to motivate good grades, graduating in time and finding employment quickly even if less than ideal (versus some I see who will not settle for less than the dream job).
At the end of the day it will be his choice and we support it either way. He is aware of what he will give up (ability to study abroad, possible funds for grad school, matching funds for a car, zero stress if it takes longer to graduate due to a dual major, etc) and what it will mean in payments and resulting disposable income. I trust him to decide what is best for him.
He also knows that very fine school is always a backup plan should he head to dream school and decide it’s not worth the price tag. Transferring would be easy and relatively painless.
Best of luck!