@Jonathan Perez
I would not discourage you from doing a house hack to get the low interest rate and low down payment. But, yes putting a larger down payment will decrease your mortgage payment. The bigger issue is the purchase price. Is it List or can you offer at a lower price? Have you completed your comps analysis to determine a Fair Market Value?
Also I am confused on your tax info:
Trash included in taxes ($250/year) - $20/month ---- Is this for Trash only?
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
What do you mean Occupied/Unoccupied? Taxes are based on the Land and improved areas (Duplex). You should be able to see what was paid for 2015 and Due for 2016.
Still not sure what your total expense estimates are (excluding Mortgage). It looks like only 25% of GSI (not including your confusing tax/trash info). Vacancy must be accounted for (especially if you only have one unit rented). I would use 10% ($128 mo.). Also, include normal repair/maintenance expense in your analysis. It is a standard expense all investors will use. Use 5% ($64) just to be safe. That will get you to 40% Expense (except tax/trash).
You eventually will move out and rent the other side I'm sure. You want it to Cash Flow at that time. So you must plan for all possible expenses. Build your cash reserves to prepare for those unexpected expenses. If none happen then you have a better ROI in the end. Eventually you may sell the property to another investor. They will be using the same metrics to evaluated the deal.
Good Luck! :)