Wizards in the Muggle World Challenge

To @SimpleIntoxication @Nephesh_Spirit @ThatVocaloidGirl and anyone else trying this challenge:

Yet another adjustment to the rules:
On testing this challenge, I cannot find a way to play each Sim equally if the households are being played simultaneously. You can pause one Sam's game when you save and quit, but the others keep playing, even if you pause them to switch worlds. They will continue to age even if you've selected "auto age only current household" (See this useful link for details)

http://www.carls-sims-4-guide.com/tutorials/rotational-play.php

BUT if you turn aging off and manually age them up, how do you decide who wins? How will you know when to age your children up?

My suggestion is this:
When starting game play, turn aging off. Play with each Sim a set number of days they would need to become adults (whether long, normal, or short lifespan--your choice) Then age them up. The same applies for children. What they manage to do in those days will determine the winner.

If you've already started playing, you could turn aging off then use the cheat code to age them all up to adults just to give it a level playing field.