Trying to weigh passion and practicality is not easy when considering graduate programs. Perhaps you should consider why you applied to the program initially. Was is the academics, research, faculty, career opportunities, internships, etc. that motivated you to apply? Those variables are really going to help you decide if the financial burden is going to be worth it or not. If you applied to additional programs, you could wait to see what type of financial assistance you are offered outside of DU and add that to the list of variables for your decision. There may also be external scholarships that you can still apply for to try and secure additional funding.
Honestly, I doubt you will find someone who knows more about your ability to afford DU, than you. Break down the costs, your other choices and your finances and make the investment that makes the most sense for you and your career goals.