well, to be honest, when I entered the game - there was nothing but a whitepaper and a plan how the game would look like - that changed drastically. I entered with $200.
During presale in December, you could buy 20 common keys - that would give you 10 cars and 1 drivers - and 60 parts/tyres. that is more than enough. I bet you could start with 3-4 keys.

Of course when the racing started revv went from being 0.018 to 0.055-0.06 and common key went from ~20 to $45/$50 in the main sale.
WIll do! :) this weekend two other events are finishing up, i'm looking good to snatch another 2nd place, and maybe have a shot at some 1st places. :)