Go outside to gain access to the stock market. Find something that is very low (1-3 dollars) and invest everything. Wait for it to go up at all and then sell everything. Keep doing investments like that, but after you have a decent amount of cash you want to start waiting for a while so it goes up to 50+ dollars per stock. At first it isn't worth the time because of how long it takes vs how much you gain, but later it can make you a fortune. I made 1 million dollars by the start of day 3 using this.

I mean, you can do that if you're weak, real ones gamble all their money and come back with profit, so like, either gamba with luck or: Save, gamba, win, save, gamba, lose, load save, gamba...

Save the game, check how stocks look the next day; load save, invest accordingly. 

they change after reloading

The easiest way which NO ONE knows was by using cheat code. how you ask? its easy. Open up the game and load into your saves. After getting in the game, open your desktop on the table and go to browser. tap the search bar above to "iamacheater". After typing the text, you'll get two option which is "tap to get 10000$" and "reset church storyline". Pick the 10000$ option and tap it as much as you want to. Get out from your desktop and there you go, unlimited money. Hope this help you all for those who want to speed up the game process and get the full sex experience with the bot full body and clothes.