I noticed lately there has been a lot of people asking how to make money quick, since it is easy to loose it from medical bills and etc.
I found a quick and easy way to make money without the fear of loosing it a lot (unless that is your not the greatest and you die a few on the missions).
1. After a while ingame you should be getting a text to do a mission from someone, and it should read 1-2 or 1-4 (1-2 are normally easier in soloing vs. 1-4). You want these missions instead of the 2-#(insert number here) so that you may solo them yourself.
2. Once you find a mission that you can play, play it and hope that you can beat it either soloing it or with other people.
3. Now that you have successfully completed the mission either by yourself or with others then at the end when you come to the voting screen. You will want to choose the wording "replay" so that you will replay the mission to complete it again to make money and I guess level quickly.
4. Keep replaying the mission until you have the cash you want, also be advised that it is recommended to choose a different mission after you rank up a bit. Since when you first start out you only make 1-2k a mission.
(Right now I am rank 17, and on one mission I am making 9k, so if I keep replaying it I could have a lot of money. Also this mission I am on is a fairly easy one at that, I could solo it)
Disclaimer: I know many people are struggling with online, but I decided to make this guide for those that do have access to the online.