https://store.steampowered.com/app/7841 ... _Republic/
I tried this title out, a slower paced builder with interesting production chains and transport systems. Once it hits full release or sale I'd recommend grabbing it to enjoy the detail and atmosphere.
It is early access and there are several bugs (on my PC it has crashed but on my laptop it has been flawless, go figure).
The style is an early 00's city builder but with the supply complexity of transport fever.
On the edge of the massive map are "customs structures" where you can buy/sell goods and power with other nations. Half of the sales points are NATO and half soviet dealing in their currency (you start the game with some Dollar and Ruble). There are no taxes, the only way to progress is sell goods for more income or source your own supplies and infrastructure to build without using outsiders.