PRO Mortgage is a Gaithersburg-based loan office aimed to make the mortgage process as simple and worry-free as possible. With 25 years of experience and a small-business approach to loan offers, it allows for personalized interaction and exellent customer service. If you don't have time to stop by the office, PRO's website is customized with a number of helpful tools, including a Rent vs. Buy calculator that will crunch numbers before you make a move on your new home.