Heya. I'm an M1 at WCM (biased), but I also interviewed at and received a full tuition scholarship offer from USC during my cycle. Is your loan offer from Cornell 30k+ more than what you'll be borrowing from Keck or "30k+"? I ask because Afaik Keck's COA is ~91k, so with a full tuition scholarship you'd still have to borrow 25-30k on top of getting a car.
Anyways, I can tell you we do not just study and work in labs all day long; It would be kind of impossible/illegal to when you live in Manhattan with a p/f non cumulative exam preclinical curriculum. Both USC and Weill are great schools that'll get you where you need to be.
Feel free to pm me.