I didn't played this game, but played all the previous games of this studio, so I don't know truth but have an assumption. Which is: money equals possibilities. More money often means more travels, more shopping, more feasts with friends, more parties etc. So poor family with illness will have less of interactions with other people, because of their social status, which is connected to money and possibilities.
A notebook and a pen. Especially the Leuchtturm1917 dotted notebook for me (plain, simple, stylish, has huge amount of numbered pages - 256), but any notebook will do. My life changed dramatically when I started to write some kind of a journal/diary.
Also, Bullet Journal system. It is not an object, but a way for use your notebook more effective. This notebook management system has it's own site with instruction: bulletjournal.com.
So now I have an archive of my past life in form of a notebooks. It stores my photos, good and bad memories, poetry, anal... (read more)