I have written up a little 12-step program for your dad, to expand on my previous post. Here ya go:
Step 1 is to ask for help.
Step 2 is reading those invaluable guides.
Step 3 is determining where and what size radiators you can fit in the planned case, if going internal.
Step 4 is researching and deciding what blocks to use for your hardware.
Step 5 is to go to bed and rethink the entire scenario in the morning, when you're sober.
Step 6 is to ask for help, and provide in-depth details about what you'd like to do.
Step 7 is to go get drunk after seeing what it all costs.
Step 8 is waking up, looking into the mirror, telling yourself, "I can do this!" until you actually believe it. (helps to wave your fist in the air for emphasis)
Step 9 is getting all the hardware together in one place, and building the beast.
Step 10 is to build the beast, for really-reals this time, not just saying it.
Step 11 is to brag to your friends, family, and half the online world about the mighty beast that you now command, while laughing at all the scurrying mortals down there at your feet with their pathetic little dust-trap "computers".
Step 12 is seeing a new case, realizing the potential, getting a bunch of bad ideas, calling the bank about a "home improvement" loan, and starting all over again.