If you are going to make money in this endeavor, you are going to have to become capable in the field of real estate market analysis. No, you don't have to take a ten week correspondence course, but you will have much to learn. There are lots of factors which will impact which houses you should buy, how much you should pay for them, how much to invest in their renovation, and how much you should sell them for. And you need to become familiar with those factors and the sources of information that help you to understand them. Success or failure in your endeavour depends on...