Wow, I haven't been on SDN in months - now that I'm an MS-1 and not an applicant, but it's great to see QofQ's common-sense wisdom once again!!
MrsRamen, I understand your predicament - as non-traditionals, we have all had an adult financial life - we're not flat-broke college kids going into medical school. However, you can't go into medical school expecting to keep the same financial structure that you had as a grown-up - it just won't work that way. If you have a decent credit rating, you can indeed borrow money privately that is over-and-above what the school will allow you for your certified cost-of-attendance - but consider what that means. It means that you'll be deferring non-secured credit card debt for all the years that you're in school/residency - and you'll end up paying $2 or $3 or more for every dollar of credit card debt or car debt that you owe now. Not a smart financial strategy (take it from me - I'm a CPA-turning-doctor, which is weird).
Unlike some non-traditionals, I didn't sell everything I own - I actually kept my house and put it on an interest-only note to keep the expense down while I was in medical school (interest-only notes are risky to me, but there's no point in paying off deductible mortgage principal debt with non-deductible student loan debt that carries a higher interest rate). But I did pay off my car and several thousand dollars in credit card debt - which was tough, because the Kaplan course, school tuition, books, application fees - all that jazz put my credit cards through the roof - but you MUST find a way to pay those debts off - sell the Vespa, sell the car and get something you can pay cash for, whatever - even a generous school is going to give you only around $2,000 a month to live on, and $700 in debt payments just won't fly.
After a very successful career as a CPA in a hospital, it's not easy for me to drive a paid-off car with 100K miles. It's not fun to give up restaurants that I used to patronise all the time. I hate not buying new clothes as I used to. I even watch the thermostat to keep the utility bills down. What worries me is that you sound as if you haven't accepted the fact that your financial life is going to change quite a bit in medical school.
But, not to worry - my experience has been that you really won't have time to notice your changed financial circumstances, because you don't have time to shop for anything except groceries!!!

Seriously, though, if I can give you any specific financial advice, I'm happy to do so - that's what we're here for.