SaveMoney is not a label or group so much as a loose collective of young Chicago MCs and musicians who have injected the city’s hip-hop scene with a fresh, exciting energy. Chance The Rapper, Vic Mensa, Joey Purp, Towkio, Donnie Trumpet, and others round out the crew. 2016’s “SaveMoney Summer” brought a flood of new music from members of the collective over the past few months, and it feels like they’re just getting started.