Aside from the actual mortgage payments, you also pay for your monthly property taxes, homeowner's insurance, and home repairs.
Sometimes homeowners also pay for monthly dues to their homeowners association. This monthly dues include water, sewer, garbage, and maintenance of other amenities like clubhouse, pool, and tennis courts.
Answer:
The following scenarios from the listed are either not accounted for or measured inaccurately by either the income or the expenditure methods of calculating GDP for the United States. They include;
1) The value of babysitting services, when the babysitter is paid in cash and the transaction isn't reported to the government.
2) The variety of goods available to consumers
3) The costs of overfishing and other overly intensive uses of resources.