Don't read too much into that - If Rice did not reply back, that's ok. Email them again after 1-2 weeks.
About tuition and fees. Just focus on the Tuition part of it for now. I will explain why. Tuition will be given either by semester, or by year, or by credit.
Schools list out other fees and expenses. While some fees are required such as graduation fees or student fees etc. These are less in amount like $500 or something - It can be ignored for now.
Schools also mention cost of living, books, misc expenses etc. This is where the difference comes in. International students don't spend as much on rent, food, books. We buy used books for graduating students. So it doesn't cost as much.
For Total = $60,000
Think like this, 24 months in US (21 months MBA + 3 months after your MBA for job search)
$1,000 per month is a good ballpark estimate.) so $1,000 x 24 = $24,000
Remaining is $36,000 or $18,000 per year or $9,000 per semester.
In addition there will be other expenses
1) $1,000 one way flight to US
2) $900 for a new laptop
3) $500 for security deposit in Verizon or AT&T for mobile, since you won't have a SSN when you land
4) $600 for flight + hotel for going to various career fairs like National Black MBA, National Hispanic MBA. These happen in September. So the moment you land in US, you go to these events to find internship / jobs.
For now, worry about just the Tuition fees.
As per W&M feel free to mention that you talked with me- Ayon De W&M MBA Class of 2015.
When you are 100% sure that you want to get down that path. Let me know, I'll write them a note. https://mason.wm.edu/programs/full-time-mba/admissions/tuition/index.php
W&M's Out of State tuition $41,682 per year. International students pay Out-of tuition. But W&M provides scholarship based on merit, it may bring down your tuition expenses considerably.
W&M also provides a $300 travel stipend to attend NBMBA and NSHMBA events. in addition they provide $150 as technology stipend - I used it to convert to LinkedIn Premium account.
Regardless, mention to schools whom you talk to that you may join back your employer upon graduation.