Can the MC accept a girl as GF? I've never seen that in this game. How do you get to that point?
yes you can
Several other girls have gf in the code aswell if you use mods to see what events are available.
I have all the extras that give +income none of the ones that increase upkeep.
when I that research was completed I lost all my income.
You don't get it.. even if I edit the save file it doesn't change the value in the game like every other game does. I already know several work arounds for this game none of them work, If it does for you great, but for me it doesn't the money value stays the same always.
Same with other stats if I try to change them they don't change.
I will look for the password, but I did search and there was no mention of a current one just old ones that do not work.