I dunno what they are like currently, but When I lived on campus and used the campus network, (fall of 1998, spring of 1999) .. I was using 16+ GB of upstream bandwidth and around 1 or 2 GB of downstream bandwidth per day. I never got in any kind of trouble. (I was running a decent sized FTP site with over 200 active accounts at the time) ... heh.
I had 14 GB of space total (1 x 10gb drive, and my 4.3gb quantum bigfoot), and was running serv-u on a windows box with a T3 (though the infrastructure in the dorms was 10mbit .. and I got less then that.) Sometimes I miss running an FTP site and getting all the best stuff uploaded to me by users, though it never stopped me from purchasing CDs. It just allowed me to have a MUCH larger music collection that my budget would otherwise allow for.) I used to use my CDburner a LOT back in those days ... stuff rarely lasted more than 4 or 5 days on my drive. Nowadays, I rip all the CDs I buy still, however, I keep em on my drive for a long long long time.
FOR YOUR SITUATION ....
I would probably avoid running an FTP that will waste 100GB of bandwidth every week. They will not like that.
I would start off using less bandwidth then you think they will care about, and then slowly work your way up until they complain.
Then back off by 10% and make that your top bandwidth usage ....