I finished the resource mapping for Rise of Rome (I might've missed some, and there's areas I just went scattershot through a combination of my broad strokes mapping and naturally dense terrain, but close enough), and as predicted, every civ has plenty of wheat already among others.
I'd rather each civ have like twenty of most resources and sparse on the rest than have any civ be screwed on resources altogether, though, so it's a healthy direction to take things in.
The other thing I did was the pediaicons and civilopedia for about half the buildings I need to make.
Not wonders, not great wonders.
Just buildings, there's about 70 left but I've gone through an extensive number already.
And mind you this isn't adding them into the game (that's a pain because it often has a glitch; you need to take them one at a time, gradually, and double-check your work ten times to ensure it's right), but it's a necessity to do before adding to the game.
I could've done more, but I was feeling burned out, so dabbled in Majesty again.
Conclusion: mods are insanely fun to play, and worked better than I could ever hope them to.
City-building becomes a cinch with the combination of brokenly fast peasants (it's nigh-impossible to lose a building and even impossible-to-build buildings can be built using it), brokenly fast tax collectors (getting the money), and the marketplaces which at high enough levels rake in 4,000 gold per deposit (and have multiple deposits per day)--plus even over the minimum distance, trade caravans depositing that same amount. Four marketplaces each at a ballpark figure of something like 20,000 per day = ~80,000 in no time flat, when the gold cap is 2,000,000.
Not instant-refill, but fairly close. If you try, you can drain your treasury even when maxed out, if setting reward flags to like 111,100 and spamming them--but that's pretty much what you need to do and even then you need to keep it up to so much as maybe drain the treasury.
...But since city-building is what I most enjoy in the game...this is no problem to me.
I am very happy with everything.