I highly recommend work as a loan officer at a mortgage broker shop and learn the fundamentals. Mortgage broker require very little capital. You can work from home office first then open a office. Please make sure you have NMLS license and certain states require a real estate licenses. You can get more information from the site below for licensing. Good luck! http://mortgage.nationwidelicensingsystem.org/Pages/default.aspx
What is the reason you are so emphatic about opening the branch as a broker and not as an affiliate of a lender?