a You buy an apartment building for $2,000,000 You make a down payment of $500.000 and finance the remaining $1,500,000 wth a 15-year Mortgage at 5%. Annual rental income is $500,000, annual operating expenses are $210,000 and interest expense is 550,000 Calculate A Monthly mortgage payment 3. Net Operating Income (NOI) C. The Capitalization Rale (Cap Rate)