Just putting this out there in case someone wants to use it:
A Cheat Engine Table for Favor and alternatively a save file with 99999 Favor points.
I tried to strip the save file of everything I could, but some progress is there, so keep that in mind.
Edit: I noticed that I'm stupid and I could just delete the save data and use the Cheat Table on a blank save, but that didn't work so I guess the Cheat Table is broken. Well, I'll see if I can fix that, for now just resert to my used file if you want to cheat like that. I'll try to fix the Cheat Table and provide a fresh save file later. Probably. Maybe...