Im with 120 provinces as Macedon, 9/9 resources, ( i own them all), i make 65K, and with the taxes very high and some dispanding i will reach the 80k, but only 10 factions are trading with me and the best was 15 trade agreements during the campaign.
I cant get a trade agreement since a long time ago, to give you an example, i m offering trade agreement to client states of mine very friently, ofering them over half of my tresury, 800k 900k, 1000k and they reject.
Thats something that needs fixing i think, i mean trade is profitable for both parties there is no logic in this.
Moreover, as the game goes, my trade parteners, even client states and very friently are breaking the trade agreements with me.