Hit the mine. Since you don’t have to invest any money, and also because the game time is stopped when you are in the mine, this is the easiest way for a beginner to earn money:

• At the beginning of the game (especially when you haven’t had the bin yet), your bag can carry only 3 items at a time. If you are running back and forth from the mine to the farm to sell the three best priced ores, you are doing it wrong. All you need to do is mine around the first floor of the mine for the 10G bags. These bags are automatically collected and changed to the gold immediately after you get them
• Buy the bin first. After playing for a while, you might get annoyed from the bag that can carry only 3 items and you’ll want to buy the bigger one, but that is a mistake. Another bigger bag will allow you to carry 5 items, and you will need to buy the second bag so you can carry up to 9 items. Instead, you should buy the bin first, the price may seem high (the bin costs 5000G) but it can carry up to 30 items. The main reason for buying the bin is so you can go mining in the deeper floor and collect ores to sell for a higher price. Therefore, you can say that this is an investment for better living.