Talk to the MSP Director at Urbana. You've already been accepted which is half the battle to MD/PhD. To be quite honest they (Urbana) made it seem relatively simple to join the MSP program. (After year 1 I think) It seemed to be recommended (if you can handle it) by the people I spoke to. I do understand that the Chicago MDPhd is a bit different than the Urbana MDPhd.
If you want to pursue law- you would have to take the LSAT by a certain year (tuition waiver for the md portion), if you want to pursue an MBA (there are also grad assistantships (?) which will cover your MD tuition)
I wouldn't say this route is easy by any chance, but there are plenty of opportunities at Uni of Illinois to tackle the debt. Some way or another it involves committing more years.
Don't forget if you're going into primary care there are loan forgiveness programs. And based on my research in specialty salaries, it's pretty common to see groups/hospitals offer some sort of loan forgiveness package included in the salary.
Personally I wouldn't re-apply because costs are constantly going up as well as the stiff competition. Nothing is guaranteed so don't ruin your future over money.