Yes a spousal and family support is important, but please...PLEASE don't forget that medical school, especially the first two years is the EASY PART.
Despite what you may think compared to 3rd year, and your residency, your first two years of medical school are a vacation. Make sure that you have some kind of plan for what you will do during those years because once you take out that first loan, you pretty much have to see it through to the end.