0 Total Cost of Ownership. 1 Tim Dear posted 3 Years Ago We are evaluating Rock to be our management system as we migrate from CCB. I'm curious about the need for development staff, how many, skills, development languages? Can someone help me? We are multi-campus with around 12,000 weekly worshipers. An example job description would be awesome as well as a recommendation on the staff that would need to customize and manage the system. What works for other churches our size? Additionally, what would be a typical timeline for a full migration?