Interesting idea. Have you considered partnering with universities? Many have support systems, diversity goals, and stakeholders that may support this cause too if they could partner with you. Do students answer phone calls? Perhaps look into alumni mentors of your program for additional resources, testimonials ... they should be a strong voice for the value you are making. You mention you work with seniors, wouldn't juniors be good for this model too?
Perhaps partner with a local university, especially yellow ribbon schools. Students are passionate about social innovation and may be able to help in a number of ways ... social media, class projects, reviewing loans, etc. May be a good idea to put one faculty member from a university on your 10 member advisory board.