Bro. Please do as modder instruct. Mine was negative too before.
What i do after that,
1.play new game
2.save when it available.
3.quit game and relaunch the game.
4.enable all
5.go to mod setting, enable the both setting.
6.minimize.
7.load the save
8.go to work for 2 times.
9.after ur money got much, disable the upper 2.
10.happy buying and gaming.