TBH - you don't want to randomize the traits. If you are putting your sim into the the Barista career, If do have a level-three food trait you want to give that trait to the kid. Same with the login bonus. Even though she's going to be the breeder. You're still trying to make money. Y'all need to make a bigger house don't we. Also, unlike the Sims 3 or 4 your energy is considerably less. So for me random traits will not work for this challenge. Yes you do get to pick a trait once you promote a sim. Use the traits and Izzy close to your advantage. Remember even though she's going to be your breeder, you can still use her for big events. That's just my opinion though. The Sims 3 and 4 rules unfortunately don't translate well to the mobile version. There is definitely going to be modification.