I use a mix of Who lives here and What do I need for my story.
A family that values highspeed internet connection will always find a way to install that, although in zones where it would seem out of place (Forgotten Hollow comes to mind), they have to pay a one time fee. The game needs money sinks, and paying for lot traits (or for removing lot challenges) is a good one.
Lot challenges also make for good timers. I don't want to roll a die every day in my fishing challenge to see whether Moby D. appears, so I gave the lot the Earthquake trait. When it triggers, that means Moby D. attacks. In the context of a BACC, the rule could be that after 3 earthquakes a positive lot trait will get unlocked, something like Good Soil, Geothermic Heat or Penny fairies.
