I only keep necessities in there.
239 MB over 889 files and 20 subfolders (I keep my stuff nice and organized..  A folder for each creator with at least 3 creations..  A folder for Miscellaneous, that is every creator with 2 or less..  A folder for clothes, a folder for skins..)
Course, that's Compressorized.  I'd like to see what it is without compression...

It depends on what you've got.  With all the current EPs/SPs, you'll probably need at least 3Ghz and 1GB of RAM to run it at an okay speed.
I'm currently running with those specs on Vista with all EPs + TSS + several hundred MB of CC and it runs pretty slow sometimes

Excuse me if I'm pointing out the obvious but, couldn't you just..  Not tell them to do something else?