@MandyTheAlabastard
The problem with keeping your plans only hypothetical/calculations & not actually playing/developing the IA cities while your learning/planning is that you've become overly fixated on numbers and advanced GBs. It's to the point you're forgetting about all you have available to you now.
Referring to your K world plans, you seem to want to do different style of RQs than the other world. Yes, CF would be of benefit if doing even moderate amount of any RQs. If I'm understanding you correctly, you want CF in that city now but are concerned about space & decreased #RQs by doing so.
But you have more space available in K than you're planning on, as you aren't optimizing it as well as you could. Some suggestions to consider:
1- Population needs
- Build Babel now & start leveling it, you must have pop GB of some sort while going thru the Ages. Then you can get rid of some cottages to free up space
- Are you going to be able to complete Carnival (hopefully without diamonds)? If so, by paying attention to which chests you should pick for best overall return you should be able to at least win a full level 1 set. That'll give you 270 population.
- You can go for Inno early instead, but it's not really necessary yet with your design. Babel can suffice for at least 3-4 Ages (especially if winning more pop event buildings). Replace it with more advanced Age GB down the road when you outgrow it
2- Happiness needs
- that level 1 Carnival set gives you 960 happiness. Add that to IA roads happiness & you should be able to get rid of all other happiness buildings - public bath & arch & Oracle. Don't rely on that GB for your happy with so many Event buildings providing so much more in a smaller space (you may even win one, like the small venice canal in this event). Again, some extra space avaiable
3- your plans for K world appears to show 2 less expansions than your other world, which may be skewing your numbers too
You should be able to fit CF (& perhaps 1-2 more butchers) + carnival set without losing more RQs due to what space those 2 things require.
You will get much more out of RQs in some Ages vs others. Production building size is one key factor (for that collect x2 RQ). Should you then wait until you get to what you decide is the 1st very desirable Age to build CF? Your choice depending on your goals of play. Also consider if you'd like to have CF bit early to begin leveling it so when you reach that Age it immediately is making a much bigger impact than it would otherwise.
Edit: Forgot suggestion #4 - city layout
- You can improve yours to free up bit more space too. study this pic (I copied it from CRs Heavy Recurring Quest guide) for some good ideas. Especially note how 3 large GBs can be attached to the townhall via only a single road piece