Sola Deo Gloria

Paul’s point in 1 Timothy 3:2 is not that a man must be married, but that if he is, then he must meet the requirements of this passage—he must manage his own household well. Literally, the Greek text says, “a one woman man,” i.e., a man who has eyes only for his own wife. He must be a man who is faithful to his own wife. There is no indication that Timothy had a wife, yet he functioned as a pastor in many ways as he was sent to various churches to do the work of a pastor/teacher. Paul was not married and, for the sake of ministry, felt that this was an excellent option (cf. His comments in 1 Corinthians 7). Jesus also spoke of those who chose a celibate life for the sake of ministry (Matt. 19:12).
Support that “the husband of one wife” means “faithful to one wife”
Does this clause mean that an elder or deacon must be married, or married only once? Some have interpreted this to mean, “married only once.” But there are several reasons this is not the best way to understand this passage.
Ed Glascock has an excellent explanation of this clause. Writing of the view that the passage means “faithful to one wife,” he says:
This view holds that the translation “husband of one wife” is not the best understanding of the Greek phrase mias gunaikos andra, but that it should be translated “a man of one woman” or a “one-woman man.” This understanding emphasizes the character of the man rather than his marital status. Thus even a single man or a man who has been married only once must demonstrate that he is not a “playboy” or flirtatious, but that he is stable and mature in character toward his wife or other females. A man who demonstrates a character of loyalty and trustworthiness in such personal relationships is qualified in this area. He, being a one-woman type of man, can be placed in this high position and trusted to deal in maturity and with discretion in a situation involving female members. This view shifts the emphasis away from an event that took place in a man’s life before his conversion and properly concentrates on the character and quality of his life at the time of his consideration for this high office.4
This is not saying a man must be married to be an elder. Most men were and are, so this becomes a very important quality that must be considered. Being married, however, is not a qualification which would seem to go contrary to Paul’s teaching in 1 Corinthians 7:6-9, 25-28 where he encourages the benefits of singleness for the sake of ministry. The whole passage is dealing with subjective qualities of Christian character, i.e., qualities in which no man is 100% perfect and in which there will always be room for growth and maturity. If the clause means married only once, then it would be the only absolute quality in this list of qualifications.
The qualities that follow have to do with temperance and self-control. The point is that a man needs self-control here as in all areas. There must be no sexual promiscuity or laxity with other women.
A further support for this position is the similar qualification placed on widows to be enrolled in the list of widows who could receive support in 1 Timothy 5:9. Concerning this Saucy makes an important point:
The Scriptures nowhere forbid or even suggest as morally questionable remarriage after the death of a spouse. Paul explicitly advises the younger widows to remarry (1 Tim. 5:14). If the qualification in 1 Timothy 3:2 prohibits elders from second marriages, then the requirement for a widow to be “a one-man woman” in order to be enrolled for aid (1 Tim. 5:9) also precludes a second marriage and thus excludes from aid in their later years the younger women who followed Paul’s counsel for remarriage.5