Why would your parents give you the difference between TCNJ and BC if you choose TCNJ? That makes little sense. What's an 18 year old kid going to do with ~$175k?
I think you far overestimate yourself with "At TCNJ I would probably be in the front of such a line," "being a regular student at BC." If you were so competitive, why didn't BC give you any money? Or why weren't you admitted to the best Boston school: Harvard?
Chances at top schools other than HPY
I'm not impressed; those numbers are far from prestigious. They might be worth bragging about to everyone attending college but to those at the more premiere institutions, they're laughable. Tone down your unjustified overconfidence because there are numerous intelligent kids at TCNJ, especially in the Bio department. Those numbers wouldn't get you into TCNJ's Seven Year Med program so you are most definitely not at the front of any line. I'd especially refrain from this attitude when meeting people at college. That is to say, unless you don't want to make friends. Just some unsolicited advice here.
First, I want to admit that I know very little about medical school admissions. However, I doubt name recognition of your undergrad will make or break your admittance to the more prestigious schools. It might help but I'd imagine only if you're borderline.
The bio classes are also not that small. They're not ~15 per class like I had. You have to deal with lecture halls, I believe. But you will definitely be able to get to know your professors if you put yourself out there. They make themselves very available. It's not difficult to get a research position with a professor as I know several who have. I don't know how BC is with their department. Perhaps solicit advice from someone who is currently at BC and then compare his/her thoughts with mine of TCNJ. That would be your best way to get things into perspective, I would imagine.
I'm not going to keep talking about the justification for attending either with the foresight of medical school because I'm not familiar with medical school admissions. To act like I am would look bad on me and help no one. I suggest beseeching others for advice. Good luck.