Homes for mentally challenged

Hi everyone Our newly hired househelp has an almost 30 year old son who seems to be having mental issues after surviving a sucide attempt a few years back. He tends to see imaginary people and go wandering away saying they are calling him. His family can't keep a eye on him at all times because they both have to go to work daily. He also searches for any and all tablets that are kept at home and consumes them. They are currently consulting doctors at NIMHANS. Are there any rehabilitation homes/ care centers in Bangalore that might take him in for free/minimal amount? TIA.