They allow members to talk about the meeting with people outside the group as long as no identifying information is used. Still other groups have no need for confidentiality. Consider whether or not your group really needs to collect money. Many groups do not need to handle money. A friendly organization, such as a church, synagogue or mosque is often willing to donate free meeting space and other resources.
Many groups remain small or medium sized and informal.
Others are already incorporated in a way because they are sponsored by a non-profit group. If incorporation is your goal, a lawyer who is a member or friend of the group may help get the ball rolling. Decide how often to meet. Every self-help group is different. Some groups meet weekly.