Kozy asked for a different rule set; essentially changing a few numbers related to non-combat victory (shorter research times, lower policy points required, etc). Identifying these numbers in a complicated code base, especially for a non-programmer, could be very difficult. For the non-programmer, understanding how the code works isn't very important. You just need to know what to change, and perhaps make sure you don't change more.
I think this is exactly a case where getting a novice programming friend to make a mod would make sense. Equivalently, to vibe code.
An endorsement for group housing!
While it's got downsides, I'd say the rpg life happens a bit more of you've got 6-8 people living under one roof (or across 6 tents, three neighboring houses, etc)