Marketing to churches and ministries is a wonderful idea. That is actually my niche. The thing to remember is that you are in ministry to help ministries. Pray that God will open the door and give you favor with the ministries that need your assistance. Don't look at just churches either... there are a lot of evangelists and parachurch ministries that can utilize your expertise... -Praying that God will bring you into the presence of those that you need to meet!