business math ninth edition chapter 16 personal finances case study 15.1 Home Buying: A 30-year Commitment? Shantel and Kwamie are planning to buy their first home. Although they are excited about the prospect of being home owners, they are also a little frightened. A mortgage payment foe the next 30 years sounds like a huge commitment. They visited a few new developments and scanned the real estate listings of preowned homes, but they really have no idea how much a mortgage payment should be on a $150,000, $175,000, or 200,000 loan. They have come to you for advice.