(Yes, there is a potential Section 179 alternative, but it is for a different post.)  

Based on your numbers, this seems to be a Section 8 duplex, is that correct?

you can use the rental section from zillow....

But section 8 is the way to go, higher rents + more security.

I recently went under contract for a 4/2 LTR/Section 8 house with current tenet in place in Jackson, MS.

Now that I've had a bit of time to put in some info into rental hero, under the "profit and loss" section, you can save/print a PDF with details. 

Another option would be to use the Section 121 exclusion for your personal residence.

I presume we do this on the “Addendum” section, correct?

I have my boat on the pea gravel area which is on the corner of my multi-family property.

Scenario 1:In this scenario we take the base case mortgage presented in the Scenario 0 spreadsheet and apply a lump-sum principal payment of $3000.00 every 10-months starting in month 10.The result is the effective amortization is reduced to 17.5 years and the total interest paid is reduced by $34,633.44 (44.6%)This is the scenario for which you cut-n-pasted a section of amortization table above, with the variance that I used a lump-sum principal payment of $3000.00 every 10-months and not one of  $2367.59.