Co-Packing

I manage a facility in Northern California (Sacramento area), we are licensed for cultivation, processing, manufacturing, and distribution. We have several of our own brands already, and I am getting a lot of inquiries from farms and individuals who want to create brands, and I need to create SOPs and pricing for co-packing/branding/packaging services. Does anyone on here have experience doing this in this industry? Looking for guidance/advice on structuring these services. Thank you