text: In ancient times a "Church" in a city was essentially a parish or gathering and the Overseer a Pastor, not a bishop, as we would understand it today.  As far as gatherings in homes, no ordination is necessary as these are prefigured from the Seder meal, which the priest sacrifices when the lambs are cooked at the temple (I am Romany, which is of the same people as Samaritans, we have lamb instead of brisket, yummy).  Point is, no priest is needed at the actual Seder and in most modern seders the wife makes the brisket (or the family cook).