PANAMA CITY BEACH — Lindsay Hall took out a $200,000 loan in 2005 on her paid-off beach house with the understanding that her $600 monthly Social Security check would cover the mortgage payments. When her interest rate jumped more than a year ago, it raised her mortgage payments to $1,500. At that point, Hall started the fight to save her home. “I want to say I did my best to fight for the American dream,” said Hall, 70. Hall has negotiated with her loan servicer, IndyMac Mortgage Services, to modify her loan payments multiple times. Each time she negotiates payments...