Buying a home is the biggest single investment or purchase that most individuals make. This project is designed to give you some insight into the home-buying process and the associated costs. Find all the costs associated with buying a home by making a 20% down payment and borrowing 80% of the cost of the home. 1. Decide how much your home will cost (and how much you'll have to put down and how much to mortgage). Find a price online(with citation) to determine the cost of a home in your area (this could be a typical starter home, an average home for the area, or your dream house). Identify and estimate all the closing costs associated with buying your home. Closing costs include your down payment, attorney's fees, title fees, and so on.