Actually, no. If you read carefully I said do as much as you can. I will include that to mean as much as you are comfortable with. If you already own a car as mentioned, than you obviously do not need to buy it. If you just want to do time trials, go ahead. Ppl who do it all are not guaranteed a position over ppl who just send in their record with other cars on the courses.
What I laid out is really what I am hoping ppl will run. If none do them, I hope most will, than I will fall back on other means. I want this to be tough, I was planning something bigger. I feel it proper to seek out the strongest in various aspects, a best of lap may not do that. Were I to just pit ppl against each other in races once a week I may dump someone who has only that one weakness, but is stellar otherwise. That, I feel, would be a mistake.