You won't want to have "clans" but instead have ,"train companies" same thing but I hire people to join my company. Then we can trade within our company,over land using our existing engines or every 4hrs a sea lane is available. Depending on the level of your port you can send/receive raw Goodson items from factories. It will add another level of strategy.
2 separate chats will be needed, one for intercompany chat and another for global chat.or, have a chat channel for each geographic location, once unlocked you can chat to that location also.
In most games we use an external chat app, most allow for free long distance conference conversations so you can speak to your foremen and supervisors and post chat and screenshots on the main chat page.
I will host one, will update if there is interest.