You want to buy a house that costs $210,000. You have $21,000
for a down payment, but your credit is such that mortgage companies
will not lend you the required $189,000. However, the realtor
persuades the seller to take a $189,000 mortgage (called a seller
take-back mortgage) at a rate of 5%, provided the loan is paid off
in full in 3 years. You expect to inherit $210,000 in 3 years, but
right now all you have is $21,000, and...