Strop, I think a better way than rising factory cost would be rising the tooling costs multiplier for larger factories, so it would be much harder to mass produce complicated over-engineered cars, but still pretty easy to make millions of simple cars cheaply.
Also, PU costs should probably scale with quality, so you can produce -15 quality cars with cheap workforce, but if you want to make top quality cars you have to hire the best (and pretty expensive) workers. These two things would allow both making even cheaper simple cars and also making those top quality cars in less numbers (because of tooling costs). Right now, even with half a milion price tag and almost the most expensive options tooling cost wise it makes little sense for me to select a smaller factory, but realistically it makes little sense to make Veyrons in medium-large factories⌠maybe make some options more expensive tooling cost wise, especially carbon fibre? Right now you cant make carbon fibre cars in small factories because they are PU intensive, and the tooling costs are the same as steel so there is little penalty for making it a bit larger than necessaryâŚ
)? Compact segment wouldnât care much about it but once we go into higher segments it becomes issue? Thing is small bodies that tend to get higher utility also are lighter and cheaper to produce, bit too good if you ask me. Another issue is that the more power you have the more utility you get, sure I see logic in that however between 150-200 hp car and 500 hp sports car there shouldnât be much difference, how much do you want to tow anyway and itâs not like that power doesnât score you points in other places already.
There will be a major revamp of the cost calculations anyway, so next round will hopefully be better again.
The in-game problems (too high sportiness possible) have already been communicated with and solved by the devs. So this challenge actually helps balancing the overall game. 
