I attempted the Stockmarket crash live event quest on the weekend. It was hard because it forces you to use a specific faction, and I had not used that faction before. There are many differences between the way buildings work, population requirements, and available options.
It took me about 6-7 hours to win the Easy mission and I struggled all the way.
It taught me a few things though, that were confusing me in the campaign. I never understood why there was three different choices for buildings, then different number of people offering types of buildings, and overlaps between them.
Starting as a different faction and not having these new options just show up finally made the concept click for me, that each of those first three buttons are faction choices, with the different tiers of building requirements then showing up depending on which faction you have clicked on. All become available in a normal mission if you 'buy' them as you progress your islands and then you can build three different towns if you desire. In the campaign I was mixing and matching the housing types by accident. I had no idea that the casino would not help my eco employee's houses and they needed a library instead (or what ever the building was).
The problem was that they just gave me the options without any explination. A house is a house right?
After a mamoth effort to win the easy World Event challenge I gave the Medium match a try. My cash hit zero a few times and I was just about to give up when I realised my focus on the population centers and their needs had actually managed to pass the goal for the Engineer class of people needed. All I was missing was a small number of the basic population. I quickly told my buildings to not auto-upgrade. I just needed to sell a small amount of my goods to the other factions for some minor cash to put down some roads and build as many basic buildings as I could. Even though my economy was running at -800 income I managed a win at about the 4 hour mark.
A major improvement on my attempt on the Easy match.
Note that I am not going to attempt the Hard mission, but I am improving for sure. I should have no problems going back to finish off the rest of the campaign missions now.