Duplex analysis Columbia SC... am I forgetting anything?

[Jonathan Perez]

2 beds 1 bath both sides

fully and currently rented for $640

new roof, good condition inside and out

1512 sq feet

Purchase price $120k

rents ($640 a unit) total $1280

I am using FHA loan and the details are

3.5% down

3.75% interest rate

30 year fixed

So, now this is what I've got on y spreadsheet. Please let me know if I'm missing anything or if I should reevaluate.

Monthly

Rental Income - $ 1280

Expenses

Mortgage (according to calculator including taxes and insurance, $700) I'll round up - $800

ALL UTILITIES will be the tenants responsibility.

Trash included in taxes ($250/year) - $20/month

I called the tax office and this is what I got for taxes. Of course taxes vary but right now this is what we've got.

$472(occupied)/ year = $40/month

$1770 (unoccupied)/ year = $150/month

Lawn - $50

PM 10% - $130

Cap Ex 10% - $130

Net Cash Flow   -      $150/month                           <<---- Is this good?