The love of the man and woman is again in contrast to the love enjoyed by Solomon. Solomon has the means to buy many wives. Yet, instead of taking care of his vineyard himself, Solomon gave it into the care of keepers, who had to bring him the enormous sum of a thousand pieces of silver for its fruit. He employs others to take care of his wives as if his harem were a commercial farming enterprise, rather than actually knowing and loving his wives intimately himself.1
This is not a literal vineyard, but as throughout the Song, a metaphor for a woman, or in Solomon’s case, a harem of women.2
11 Solomon had a vineyard at Baal-hamon; he let out the vineyard to keepers; each one was to bring for its fruit a thousand pieces of silver.