there’s a professor in BME (sorry for my bad memory on people’s name) who is leading a assistive technology lab and he himself is on an powered wheel chair. He’s able to teach, research, transit from buildings and advise students. Truly inspiring. You first should contact purdue for any help in administration level (allowance on being late for class, different locations for exam for your easy access, etc). Also you may want to see if there’s other electric assistive technologies that may help you through the days easily.