You will need:
- A modded sp char did you see North Yankton with a modded sp char?
- 2 characters online staff
- Your two characters with same garage
- And spawn location on the same garage
Step by step :



Start modding your story mode char from a save, then load the game
Then go online with 2nd char ( slot 2 )
Fill up your garage with 10 free or stolen cars
Select main char (slot 1)
Go to your garage and dpad and select the Modded sp char from previous
Once in story mode : Pause menu - online / play GTA Online / session for you and your friends
Once in online, instead of being with the Main char (slot 1) you have start with your 2nd char
Go into your garage and sell all the cars :smile:
Back to Main char to return to the normal

Credit to=Forrest Gump 94 Se7ensins