Begin to create an organizational structure. At this stage, having a paid staff is probably unrealistic. Inevitably it will take long hours of volunteer labor and in many cases, personal equity to reach a point where accommodating a full time staff member is possible. Many organizations never reach that point. This is often because involvement by volunteers fizzles out and the mandate of the group never requires that level of formalization.
Many groups are ad hoc and temporary, never outliving the issue that inspired their creation.
For those that have a long-term mandate, such as economic renewal or industry diversification, paid staff will at some point be unavoidable. This early stage of mobilization is the appropriate time to begin considering such issues. This is where the roles and responsibilities of future members will be tentatively sorted out.