I don't have a walkthrough, but I may have something just as good...
I've just finished converting the whole game to Ren'Py, and you can download it from the Family Life Unofficial Ren'Py Converstion thread.This version of the game has a built-in cheat system that makes the game much easier. It also has a "thread board" which helps you find how to trigger the next event for each NPC.
I'd really appreciate it if you tried playing my version of the game, as I'd like some feedback on what's good and what needs to be improved. But, if you don't want to download the whole game (10 GB), you can just download the base game (150 MB) and view the thread board to figure out what to do next in the QSP game. To view the thread board, you'll need to select "Cheat Menu" from the in-game menu in the upper-left corner and select the "Enable threads menu" item. Then you can select "Threads" from the in-game menu. Once you see the thread board there's some help that will explain how to interpret it.
This version is very good,
Thanks
I found a bug I hope you can fix it