I looped back to read up on the British Orthodox Church, and saw news of a new mission in Windsor:
Father Peter had prepared to pray with one person he had been visiting for some months, but as the prayers from the Agpeya, or Coptic Daily Office, began there were eight people from a variety of backgrounds who had come together to begin this new service. And a further eight people had wanted to be present but were unable to do so for various reasons.
Let's revisit that: "had prepared to pray with one person". I won't say that an intended one-person mission is the best way to make something last. And indeed, there are significant polity, historical and demographic differences between the kind of churchmanship the British Orthodox have and that most of my readers (the Indy Catholics perhaps excepted) but there is something about the audacious faithfulness about starting a mission this way is worthy of respect and perhaps adaptation.