Ofir Ventura - Investing in real estate may be quite profitable. It is said that real estate is one of the best ways for people in the middle class to become millionaires. When deciding to become a property investor, there are two markets you can go into, residential or commercial real estate market. Both markets have pros and cons. With residential real estate, the deals are relatively simple. You are generally buying single-family homes, condos, or townhomes. In either of these types of purchases, all you need to know from an investor's viewpoint is if the properties can generate positive monthly cash flow.