@Blue Presley @Greg Scott covered everything, but if you don't believe him, go find an ROI spreadsheet for real estate and calculate all this for yourself.

I cross checked this year return before purchasing my 4th unit with turbo tax and i was not far in my calculation which the CPA did.

View report*This link comes directly from our calculators, based on information input by the member who posted.

To be honest with you even in the 3% rate environment 3-4 Fam was tough because of the way self sufficiency is calculated and NYC/NJ price points.    2 Family will certainly open up a lot more options. 

A lot of the online calculators will automatically input 5% for both capex and maintenance and then you can usually edit it if you use a different number.

If they report to the credit bureaus it will affect your DTI as your DTI is calculated based on what's on your credit report compared to your income.

Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

But you need to really understand how to run your numbers, your cities property tax rules and how to calculate true future taxes (I see a lot of folks fail here), etc. 

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Are you calculating your MAO differently?