Photographer OR digital artist needed

I need a photo or a digital artwork for a book cover. This will be a non-exclusive contract. The photo or digital art is for a Christian book on the history of polygamy. We need a photo of a physically attractive caucasian couple in their late 20s with a semi-attractive black women in her late 30s. The man should be seated with each woman behind him, or all 3 can be standing with the man in the middle. The man should be in a black suit and tie and have a full beard, while both women should be in a very modest dress and be wearing a "prayer covering" (bonnet, head wrap, etc). We also need some artwork (preferrably digital) for a book my husband recently wrote defending the doctrine of the Trinity against the claims of other religions and are open to ANY and ALL SUGGESTIONS as we have no clue what type of picture would work best. Please give a price quote for one non-exclusive photo or digital artwork. Thanks. If the wqork is good there is a possibility of alot more work!