I was also impressed with UNLV. They have a great patient base, great, new facilities, friendly faculty members, and awesome students. The cost was the only thing that got me, but as flabernak noted, you can get in-state tuition the final three years (it's around $40k for in-state, and $70+ for the first year out-of-state). Overall, it was in my top few schools, but I got into what is essentially my in-state school, so I ended up declining my spot.
If I were you, I would definitely take the interview. Vegas is very inexpensive to live in as others have already said, so UNLV would likely be cheaper overall. Plus, Dr. Brownstein and Dr. Ancajas are awesome. If you have an interview there, you have a good shot of getting in.