Fail.
Jesus completed the priesthood, and conferred the honor on each and every believer.
That formulation does not address the matter of who among us is best fit to perform the missions assigned by the Spirit, and how error is to be avoided. You posit a kind of anarchy. In a way you are proposing the same kind of existence led by the Desert Fathers of Egypt and Syria, who withdrew from the cities in order to live holy lives. But the Acts show the Church as a Community, and within that community lines of authority and the rudiments of a liturgy, one founded on the worship of Jesus as Lord. No doubt that power was not confined to the Twelves and the large but unknown number.Paul speaks of 500 who can attest to the Resurrection. Yet there is a gravitational pull to congregation. These are after all Jews, and so they come together quite naturally in Christian synagogues, and do given honor still to the Temple, which however has acquired an entirely new meaning.