I'm going to be running the Beginner Box for the first time for a few friends. I'm thinking I want to flesh out Otari, but I don't have Troubles In Otari, which I plan to buy and run later. Should I worry about creating conflicting elements of Otari, or is it as sparse on details in the other two APs as it is in the beginner box?
As others have mentioned, Abomination Vaults will give you more info thanks to the Gazeteer. There you'll fine all of the locations, the NPC of interest, as well as the types of Earn Income the players can leverage and the associated skill.
I would highly also recommend this pay what you want resource found on Drive Thru RPG
The Abomination Vaults Expanded
It gives the NPCS and town a whole lot more detail. I used this along my own interpretations to give the town a lot more life than the beginner box, Troubles in Otari, and even Abomination Vaults gives these NPCs. v Definitely worth giving the creator compensation.