I'm guessing this will be the fastest way to get cash after they nerf the missions again.
Hopefully they won't... They even appear to promote mission farming to a certain extent..
THat was stickied by a R* poster.. and I've also seen official statements from Rockstar concerning farming and they're fine with it, it's legitimate and it is actually playing the game.. in their words, people the game in different ways, so yeah, if people farm, they farm...
And as for people being scared of getting caught doing money glitches, screw 'em..
I've made 1.4M in four days and it actually feels good to have all that money building up in your bank, knowing it's all kosher and not likely to be taken away..