Answer:
The main condition is to be equally yoked together with another believer…
2 Corinthians 6:14 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
Since the Bible also tells us not to be stumbling block to others, we need to do it in a way that glorifies God and also takes into account state and local laws. I would recommend an ordained minister who confesses that Jesus Christ is Lord and also the head of every household!
Good question,
Pastor Brad