I did the exact same thing as you! I moved my founder into Johnny Zest's lot because the Bedrock Straits neighborhood seemed to offer the most apocalyptic vibe. When I had to restart, I chose a more children-family area.
The creator Pinstar has updated the Apocalypse Challenge rules for so long that you'll have many of your own decisions to make about newer Sims 4 content. You are consistently one of the top-scoring Tournament players on this forum, though, so I can imagine you will slay this challenge as well.
For example, I've read some comments on Pinstar's website that imply that the Apocalypse house can only have 3 floors (basement, 1st floor, 2nd floor, and rooftop), but I made a five-story + rooftop house because I enjoy playing large households. But now with toddlers and all their special furnishings and needs, only 3 floors on a 8x8 footprint would be quite impossible.
Thank you so much for your nice words about my Sanada story! You can't imagine how happy that makes me!
When you reach the end of the challenge or anytime earlier, I'd love to hear your thoughts/strategies on the order you chose your career unlocks.