Program
Whoops, I guess I didn't make it clear enough, but I had no intention of doing all the rating calculations by hand, I only put the formula there so you could understanding my mathematical reasoning and such. I fully intend to code some sort of program (or at the nut low, some kind of spreadsheet) to calculate the data for me, as there's absolutely no way I could do all of it by hand, keep it accurate, and stay completely sane at the same time. My knowledge of programming is actually somewhat basic, but this is essentially just taking variables and having it do a math problem over and over again, it's something even I could manage within the hour if I could get away from all the distractions in the world. The real issue is actually cleanly getting the data together into a manageable form, so that's what I'll really be looking into while I work on it.
Capacity
I'm not actually sure if I can really handle the whole netplay community by myself, actually. If my dream comes true and netplay really takes off, I'd have to get some hired help. Luckily, the bigger the community gets, the bigger pool there is for people to help out, so I am hoping that it will expand at a manageable pace. As of right now, my goal is 50 active players, so I'm looking at 25 X 5 matches to input a week, so about 125 matches per week total. At a glance it's a lot, but I used to work as a part time data entry guy and could get something like that done in a couple hours. Still, I'm only guessing, so I really have no idea.
I'm going to edit my post now, I realized that I forgot to put in anything about time and the like, so that would probably be a helpful.