Homeshare is a program that matches older individuals who need assistance with younger people seeking affordable housing. It aims to address issues like loneliness, social care needs, and lack of affordable housing by having participants provide each other with 10 hours of support per week in exchange for reduced or free rent. A homeshare agency brokers matches between participants, assesses suitability, and monitors the arrangements. The program has helped address social issues while providing a sustainable housing model, though it faces challenges in gaining widespread adoption.