I am applying to med school in this cycle. I applied to ~20 schools and I was fortunate enough to receive 14 interview invitations so far. However, I am distressed by the expensive nature of interviews and the fact that I have to take 2 days off of work for each OOS interview. I plan on attending all of the interviews scheduled before Oct 15th. My question is whether I should book the flight tickets and hotel for the ones after Oct 15th ahead of time. Can someone with similar experiences provide some thoughtful insights on this topic?