The Sims 4 I'm a Lover Challenge 10 Generations

I just got to the second generation, I'm having fun with this challenge! My sim haven't moved out of her parents house yet (she is a teenager, I'm waiting for her to get married as an adult to move her out).

I still don't know how I will get all the graves for the gen 10 cementery. Has anyone figure that out? I was thinking of having one sim that would go house to house when the sims die and collect them, but haven't tried that yet.