i think 3 hrs to build/install all fans/wire management (not too good)/place lights/all that crap.
about 2 days to get the Os installed/hook up to the network/configure all the network settings and create me a new account/and get the necessary benchmarking/temp monitoring apps installed
then probably about 2-3 weeks to get it overclocked, fine tuned, and benched and tested. so basically a month on average to get the PC exactly as i want it, but i change it over everyday so its never really done lol. i always overclock it just to see if i can get an extra 1mhz or 2 outta it.