I don't know about the save file, but maybe there is another way to get more money. Maybe it would be possible for some devs to change the amount of money you get by working. Or when buying something you get money instead of spending money. Normally you can change the price to -1000 to get 1000 when you "buy" something.
I am not familiar with changing in game content, just putting forward some ideas.
I am not familiar with changing in game content, just putting forward some ideas.