1Find the current requirement
Join the game and inspect the current car purchase prompt. A requirement shown in your server is more useful than an older video title.
2Compare the opportunity cost
List the machines, workers, or layout improvements the same cash would postpone. A milestone can still be worthwhile, but the tradeoff should be visible.
3Use measured numbers
If the car has a displayed cost and you are comparing it with gym upgrades, enter that cost and your current cash rate in the calculator. Do not add an income effect that the game does not show.
4Recheck after an update
Cars are part of a current update theme, so locations, requirements, or available models can change. Revisit the official description and update page before following an old route.