The promise of quick cash has landed thousands of unsuspecting homeowners across the country with 40-year liens attached to their homes or lawsuits demanding thousands of dollars, in what Florida’s Attorney General now calls a deceptive scheme to swindle customers out of their home equity. Attorney General Ashley Moody filed a lawsuit Tuesday against MV Realty, a Florida-based company which was the subject of a national collaborative investigation by eight local television news stations in November.