MassHousing closed on $8.5 million in affordable housing financing to the nonprofit Just A Start for the development of 24 new affordable apartments on its Rindge Tower property in Cambridge. Just A Start will construct a new six-story, wood-framed building, containing the new affordable rental homes, as well as 40,000 square feet of space to be used by Just A Start for its new Economic Mobility Hub, which will include education and training facilities, and administrative offices, and by the city of Cambridge for use as preschool classroom spaces with priority enrollment for residents within Rindge Commons.