All you need. Nothing you don't.
Most towns have welcoming signs at the “city gates” posted by civic groups such as Ruritan, Lions, Optimists, or Kawanis. Most of these groups are into service of some sort and that of a voluntary nature.
Many think that without a paid pastor, a local church will fall apart yet these civic clubs do not have paid leaders and they keep on going from one generation to the next. Some even have local chapters in the schools.
The Boy Scouts of America is another example of how community organizations without professional leaders can have local impact. The troop which my sons are a part of often has half a dozen parent-leaders show up.
Oh, and did I mention that, as a rule, these groups do not see a building as essential to their existence or services?
Wondering as I wander…