I plan ahead, I have a google sheet I made for each chapter lol, so I know what buildings get upgraded in what chapter, as well as size, Pop & cult needed, how many expansions in the tree and world map I will get, A list of my AWs and if they give Pop n cult when upgraded, and even a list of event buildings and how much RR spells needed for upgrades. I do try to upgrade event buildings for Pop & cult rather than trying to find room for another building, hey,,every little bit helps lol ;-)
But,,, just because I plan ahead don't mean it will go as planned lol, New Event buildings can be a game changer!! ;-)
I thought I had the pop covered that I will need with these crab hotels, I have 3, not yet put in, BUT the next event,,,,I must have the brown bear! lol so here I go again lol,,,,