What’s the best way to make money in Sandbox Mode?

[TheRedGryphon]

I know busting up the slot machines in the casinos is a viable option and so is using a money hacker on ATMs, but is there an even quicker way to earn money?

[Theseus]

currently to be 3.5 mil in like 2-3 hours. what I was doing is going through the left door in the hallway of the first maintenance room right after leaving the safe room. then using the flashlight and the p.c there to make one of those money hackers. stocking up my full inventory on it. then going and making the chainsaw motocycle, then just driving up and down that strip near the s3x shop and the stage. there is 2 atms there, you can get them. then drive up near the taco shop and drive down into the underground, drive back up and boom repeat process. getting those 2 atms every like 1 minute so 40k every 1 minute