Other costs: vacancy 10% rent, management/fixup, 10% rent $2000*20% = $240
monthly fixed cost: 1160+500+100 = 1760
income (less other cost) 2000 - 240 = 1760
with 75% loan, break even. With 80% loan, negative cash flow.
Return for the first year:
Principle paid: <$3000
initial down pay: $70000
return 3000/70000 = 4.2%
ps. If you invested in MXIM (tech stock), you will get 4.2% divident easily. no hassle, and get money back any time you want.