When I interviewed at A&M I had a similar situation. I had Lubbock on Wednesday, A&M (Temple) on Thursday, and UTMB on Friday. I called the admissions office and told them about the situation. They were extremely nice, understanding of the situation and more than willing to help out. She gave me several different dates to choose from. So if you want, you can try to call A&M and ask if you can reschedule.
When I interviewed at A&M, I signed up to stay with a student host but I ended up staying at a hotel because I was never contacted about staying with a student. What I would do is to sign up for the student host program, book a hotel, if you get an email about staying with a student then cancel the hotel reservation. If not, you always have the back up plan.
I just saw the post above me about the interview day at A&M ending early. I think it depends on which interviewer you get and what time your interviews are. Some people had interviews that ended at 3pm, others 4 or 5pm. But the interviewer that I had was behind on schedule so I ended up getting out at 6pm.
