Complete jobs to make money. Although this requires time, do so as much as possible. Hire tutors. If selected correctly, they can significantly increase your stats. They can also earn money. When you hire a tutor, you will pay a fee for their services to get an increase in strength and intelligence. However they can be hired back from you later, and the person that hires them will have to pay more than you did, giving you a profit. The more tutors you have, the more money you can make. Find an opponent to battle that will result with a guaranteed win. Purchase all their tutors to increase the amount of money you can get. Attack them three times in a row for an easy profit.