You know, Sir William Osler thought anyone devoted to pursuing internal medicine should be "[c]ontent to labor and wait during the first 10 or 15 years of professional life," but clearly these students are able to carry on relationships despite the challenges presently faced. Since the first two years of podiatric training are very similar to that of general medical students, it would be reasonable to assume that you can really do whatever you want relationship-wise given the correct combination of commitment to/from this person, work ethic in school, and any innate brilliance. As long as the girl knows she won't see you except for an odd weekend here or there outside of your breaks and is okay with your focus being diverted elsewhere, you'll probably be fine.
This sounds like misapplication of your undergraduate experience to something that will be in no way like undergraduate education (unless the variance between podiatry school workloads is significant, which I don't know having only been at one). If you're suggesting that living together is a walk in the park during this time, however, or that visiting each other every weekend there's not a scheduled obligation is a reasonable expectation for this person, I think you're being misleading. Considering you haven't been through the wringer yet, I would personally suggest refraining from giving advice requiring a perspective you don't yet have.
