This is my completed Lindum scenario, with a population of 27,246, all of them in Small Insulae (every house had to be SI to achieve the 50 prosperity requirement). Once again the idea was to reach the limits of fed population. Except for selling 15 meat per year to Calleva in the early years (that will give some idea of how tight money was early on), there were no exports. Tax was the only income. I did not build walls or towers, my only defense was 6 legions of javelin throwers. This is perfectly adequate provided you know the location of invasions.
Furniture was only produced to send to Caesar and neither oil nor olives (nor marble for that matter) were imported. Only food was imported or exported.
I opened Lutetia and Londinium trade routes in the last 3 years in order to import food, which allowed a slightly higher population (1,200 or so).
Victory screen appears shortly after the save. The city is almost perfectly stable up until the next Celt invasion which comes in the WNW right near several buildings but is perfectly defensible if the javelin throwers are correctly placed in time for the Celts' arrival.
This city is very close to the walker limit. At one stage I had most of my soldiers disappear when ordering them back to fort, and there were problems with the clay cart pushers too. This shouldn't happen again provided population remains stable because there is now no immigration.