If they have high expectations for you, they will have to pay for it. The very top schools have no merit aid as mentioned, and unless you can find a sponsor from your home country (which does happen on occasion), your parents are paying.
Or you are not going.
You need to talk to them about UMD, hopefully you will qualify for a lot of merit aid there.
Also - how did your parents pay for school? Did they work while in medical school and getting an MBA? Or did their parents pay?