Right now after the patch, assuming fishermans is still the fastest way to earn money, that's 850k per hour. So, roughly 24 hours of grinding the same rally race over and over for a single 20,000,000 Cr car, of which there's surely gonna be multiple.
I think the sport mode payouts are the worst too considering that'll be the main thing a bunch of people will want to play (including myself). With the deep forest race, you got like what, 20k at best? Let's say you can do 3 of those races per hour.
That's 60K per hour, or over 330 hours for a single 20,000,000 Cr car...
I get that some people think the game should be long lasting, but I hate that argument. Your time has worth, even if you're using it to play games. If you pay 80€ for a videogame, you should be able to access its contents in a reasonable timeframe and not have to invest your entire life into it.