It is pretty fun, I've made a ton of cash taking on some advantageous drug deals. I managed to get like 50 units of weed on the cheap somewhere and sold it to someone paying "premium" for the stuff and got almost 40k in one shot. Did a similar thing with some coke and managed another 20k. I've bought out like, four safe houses on top of that. I've been spending time trying to complete side objective though, like crashing through billboards and taking out security cameras but on the way I tend to find these blue swirling vortex things but can't figure out what they're for or what can be done with them. Any ideas?
Also, people keep telling me there is a tank out at the airport, but I can't find it and I swear I've been all over that place. And also figured out that hijacking Ammu-Nation trucks isn't worth it. The first time I was successful with it, I wasted two or three molotovs, was nearly killed when the driver got out and came after me with a shotgun (took him out with a molotov) and after hijacking it, spent quite some time to get back to my safehouse (this was before I bought so many so it was a long trek) and managing a three star cop chase on the way which was hard enough and nearly had the truck ready to blow from the damage it took. When I got to my safehouse and opened up the cargo bay I was awarded with... a friggin handgun. All that BS and I got a handgun? So yeah, I don't even bother with that side objective anymore. At least drop me a minigun which is rare so early in the game unless you pick it up in one of the rare missions that has it.