My memory isnt what it was.
In that 10 month period, I was researching configurations, parts, home networks (as well as other things), and configurations from sites devoted to digital video workstations. It was intense to say the least, and as with most things to do with IT, every iota had to be researched; this is how one builds the 'puzzle', which it very much was. Remember, I had no background at all in any of this prior to beginning.
So, it was research about the relevance of the said part, the relevance of the said part to other parts,and its function(s). All of this has to be understood until you get an understanding of the 'whole'.But not to the point that you are starting to study for a degree in computer science, though it at times felt like it. In one sense, you can say that the configuration you decide upon is the manifestation of your understanding of the 'whole'.
As mentioned, I researched and gradually derived a configuration, while seeking quotations from a number of other suppliers or builders eg Dell. These had to be discussed with my good friend who works in computing and has a good background in hardware & software. It was this continual backwards and forwards, and research, research, reseach. Needless to say, after selecting my final configuration, I took it to a number of small shops who can actually put your configuration together for you, or provide you their own recommendations & put the box together for you. I gave them my configuration, and examined what they also suggested. You can get taken for a ride if you don't know what you're talking about with these boys. As it is, with the one shop I decided upon, the suggested motherboard I later researched and found that it did not possess the required function for digital video. The chap was embarrassed and quickly changed the motherboard. Generally though, this shop was better than the other shop's configuration. From what I can see, it appears that most people don't go to the trouble I did.
When all of this was done, I gave the go ahead, and the shop assembled the pieces, installed the software, set the bios etc which I have no knowledge of, amongst other things. This process requires around 4-5 hours. When finished, I paid my money, took delivery of the assembled box & other things, & went home & set up the machine. I couldn't really use it properly until I had the network set up, by my computing services firm, a little while later. The whole process is like cramming for exams, except that the cramming period stretched for 10 months.