This is inspired by GovernorSimulus' maximum population quest. but instead of fitting as many people in a map, I'll focus on getting 12k population in Old Kingdom period.
My personal rules in this quest will be:
* Very hard difficulty
* 12,000 population
* 100 prosperity rating
* All houses are residences or better
* All roads are connected, optional for entertainment venue
* All schools, libraries, mortuaries and senet houses are well supplied.
* Personal funds only used for kingdom rating
* Smooth population census - no aging problem
* Final city should runs with minimal intervention
12,000 citizens live in 12 palatial estates and 120 common residences. Taking advantage on Bast temple complex, I uses two butterfly housing blocks to overcome papyrus shortage here.
Problem #1: 2,500 papyrus a year
Initial planning shows that 2,500 papyrus are enough to keep 1 library and 3.7 schools running. To be safe, I've decided to use 3 housing blocks only.
Iunet proved to be an interesting map under these constrains because the first two housing blocks have to be built on the north and east land mass, both of which are mighty small considering the fact that they are also the best spot for industrial district, food production, goods distribution and the excessive entertainment venue. So the third block has to be large but at the same time conform to the narrow terrain here.
In the end, two butterfly blocks are used, kept very stable by Bast temple complex's ability to lengthen the educators, entertainers and health providers lingering effect. The north one uses two 46-tile loops while the south one uses 58-tile loops. They are large, but compact and terrain comforming.
Problem #2: Unemployment
I have used 48 work camps and pottery/beer/linen/fishing overproduction to absorb the excess workforce. The meaningful employment is around 1,500 out of the available 2,650 workforce.