sorry i just redid my system most of it is not setup yet but it kinda gives a idea...
it keeps track of the MAC address for the computers therefor even when you reinstall the OS it's still gonna keep the computer so therefor u'll always end up keeping the computer so even if you change the router you'll still see your computer
you don't need much computer power at all
as i showed in the video i had a 800mhz Intel **** A 160 chip can power it
bandwidth wise i have a N router and it works pretty good wirelessly
when i was in high school i had an asshole teacher and and he remoted all our computers and we had pentium 3s with SDRAMs