Tertullian was a layman, not a priest. How is his marital status relevant?
I'm sure you're familiar with 1 Cor 7:32-34, where Paul specifically teaches that the unmarried state frees one to better serve God.
Paul also goes on to say that if anyone can’t abstain, then they should marry. Nowhere, does Paul say that one can’t be the leader of a church if they are married.
Peter was married, and the Catholic Church says that he was the first Pope. If I’m not mistaken, weren’t the Catholic Priests married in the early beginnings of the Catholic Church? There was a reason why they were forbidden to marry, and it seems like it had to with money. When the priest and his wife divorced, the church was having to pay her divorce settlement, and/or alimony.