So you're looking for south of Boston, then, if you work in Mansfield? I'll ask around, but I know on the North Shore affordable housing that allows pit bulls is usually owned by slum lords and is still pretty pricey. If I hear of anything I'll let you know.
"All changes, even the most longed for, have their melancholy; for what we leave behind us is a part of ourselves; we must die to one life before we can enter another." -Anatole France