This is a realistic scenario. We are faced with a problem on an unknown battlefield. How to survive?The licensing issue is an especially big deal. More schools have been extorted/blackmailed over this single issue than any other. You don't want to be on the receiving end of an audit compliance threat, let alone the actual audit.
5)Please use gigabit/s cat 6 networking for all servers. One gigabit/s line can easily handle your lab. 100 mb/s can too, but you, and your users will know when things get busy. Gigabit to 100 mbit switches are pretty cheap these days.Actually, the copper Gig-E spec (802.3ab) calls for Cat 5. No, not Cat 5e--many people make that mistake--I mean the original Cat 5. Of course, anything beyond that, like Cat 5e or 6, will be just fine. My advice: check out what Cat 6 costs. If it's close to 5e's price tag, then sure, go with 6. If it's way more, then go w/ 5e.
6)Please use RAID 1 on your server. This is slower for writes (installation and saving files) but allows simultaneous seeks for simultaneous users/pocesses. Hard drives are about 25 cents a gB for 500 gB.RAID 1 certainly works, but if he can afford it, RAID 5 will be even quicker due to more spindles.
Good luck. I would be glad to help, but I am 500 miles away.And I'm even farther--about 1,500 miles--otherwise I'd be glad to jump in, too.