In analyzing organizations of people there is something called
Playing The Find The Fox Game.
It is essentially meeting people within an org chart and even if they don't have the title associated with their name they are in a position of power, authority and are the one to rely on for key decision making. With homebuyers in looking at a couple MOST often the find the fox defaults to the wife as signing off on the house, but be careful NOT ALWAYS. Sometimes it can be tilted slightly over to the husband especially with affordability and budget.
Young people often their parents or grandparents have HUGE influence over 'WHAT IS ALLOWED TO BE BOUGHT'. Sound out all the parties on the purchase side and you will figure it out. Most often the woman is the "DECIDER" and the role of the influential decisionmaking fox but BE SURE. You need to work very close with this person in this role to make things happen. The obvious ones are not always so obvious when it comes to who has the power.