We earned money in different ways, but if we don't know how to budget them, then it'll be a waste. In this game, you start as a normal person with a normal job (basic salary). You go to work to earn money, buy food & drinks and rent some clothes to use. You can also earn money by working part-time jobs: Mining, Fishing, etc. Don't get sick to save money, bills from the clinic are quiet high. If you run out of money then the game is over. So good luck :D
The point here is how you budget your money starting with a low salary.