A mortgage is a loan that is used to purchase real estate and is usually paid with monthly payments and interest rates. A Mortgage can be used to help an investor get more out of the money they are planning on investing with. Usually using a mortgage can help an investor purchase a better investment, which can produce a greater return and reappreciation in value. The bigger the investment, the bigger the return. Another important thing to think about is how you are going to reinvest the growing equity after several years. Typically selling and reinvesting can be better than refinancing your loan.