Russian family received the refusal in help place son into the Residential Housing,pension, stamp foods,cash benefits

My son Ilya resides 5 months already in Westwood Hospital, Boston, MA. There he was placed as a homeless with mental health problems. Administration of our housing did not allow my son to live with us because Ilya became as adult.
Ilya is 19 years old. He is disabled since childhood.
Three organizations:DMH, DDS and Riverside can not decide who of them will take care of Ilya.
The Hospital does not want keep him and is looking a foster family for Ilya .They want force him for agree for a living in an alien family. But Ilya does not want and dreads.
He needs the Residential Housing, where Ilya could live, grow up and adapt socially.
Our family has no income but we received the refusal in any sosial help , despite five years of official resident status.
Please, help our family