What you are saying makes a lot of sense -- and I really applaud your focus on compensation for the peer mentors. In my experience, programs often assume that people will be willing to volunteer and they count on this in developing the program. But when you look at the issues more closely, you realize that these are people with a lot going on -- their needs have to be a priority of the programs as well. I think it's great that you are keeping sight of that in your work.
I am much more familiar with this kind of work in the international sphere, so there may be more relevant domestic examples that others can fill you in on, but you may want to take a look at the participatory video work being done by Digital Green. It's had some great successes. Their experience is mainly agriculture, but they recently worked on nutrition topics with the SPRING project: https://www.spring-nutrition.org/about-us/news/springdigital-green-launch-all-10-community-led-nutrition-focused-videos