Ramoray, the phrase I've heard repeated over at each financial aid presentation when I was interviewing was: "Live like a doctor while a student, live like a student while a doctor." You probably heard that, too.
But, I also know that GW is on the pricy side - and DC costs as well.
There are things called 'no-doc' loans - as in 'no documentation' required for the loan. Most loans require your school to certify a total budget amount, and will not loan you above that amount.
With 'no-doc' loans, you can borrow beyond the school-certified budget - at a higher interest rate and fees.
Most borrowers will require a co-signer - someone who will continue to work during your time in school.
The only loan provider that offers no-doc loans that I've found was:
http://www.educationone.com/foryou/graduate.html
The interest rate was ~6% - about two point above the Stafford loan rate, and an origination fee exists for this loan, where most of the Stafford loan products do not charge one.
Good luck, and let me know if you find any others!
- Tae