After careful thought of the advice given form some pretty knowledgable such as Factionheir and alpaca, I wonder if these points have been considered?
Factionheir, I have considered using the add_money cheat but I just decided to take it all at once. Using the add_money cheat, add_population cheat, and process_cq cheat, I can turn any village into a huge city with all the building built in one turn. I have not done that. In fact, I have used a lot of constraint.
when counting symbols at 90 regions for end of turn the possibilities are these:
Disaster = 1
Enemy agent caught = I have had as many as 6 and they are all inividual.
settlement besieged = 1 per settlement besieged. I have had as many as 5.
end of year report = 1.
guilds = 1 per guild and/or upgrade.
construction = a possibility of 90 but probably 40 or 50. Only one construction symbol but all these are buried in it and that eats memory hole by itself.
recruitment = average of 2 to 3 in vanilla x 90 regions easily puts it over 200 new units. Only one recruitment symbol but all 200+ of these are buried in it.
family = endless possibilities with births, deaths, marriages, traits, retinue, etc. and they each take memory.
diplomacy is as varied as family depending on how many factions still standing.
Council of Nobles.
Pope and his wishes.
Crusade stats when there is one.
Jihad stats when there is one. I have had a crusade and a jihad going at the same time.

If you can show me the numbers to prove me wrong, and I seriously hope you can, whether its year 1200 or 1400 with gunpowder it will crash.