things missing in your list (everyone manages differently, so take it with a grain of salt)Vacancy rateTurn overbad debt legal fees (evictions as needed)accounting fees for professional tax prepmaintenanceProperty TaxesSales Tax on PM fees (In NM, this is charged, not sure about where you are)Reserves for replacement CAPEX - furnace, water heaters, ac, roof, parking lot, etc.Admin, software, advertising, etc.Cost segregation study for accelerated depreciation captureAs for your loan. 

Cheers,Bill I am curious as blockchain has been talked about for a decade, can anyone share a case study / example where it has been made into an enterprise model and used successfully?

Study all strategies, markets, etc, and find what fits your strategies.

Quote from @Joshua Wei: Can anyone recommend a company in or around Birmingham, Alabama that performs cost segregation studies for single-family homes?

If there is still money left, I would set it in an account and study here on Bigger Pockets and get and education in stocks, options (i love options), notes and real estate.  

I studied abroud in Barcelona a couple of years ago - that place is beautiful!

If you study the economics of this industry, you'll see that it's very much like a sports team.  1% makes most of the money, then a small 2nd tier of agents do some transactions and a majority of the rest do nothing. 

Focus on networking, studying the market, and analyzing deals often to find the best opportunities.

Imagine you bought a property for $2M.The land (excluding any structures) is valued at $400K.Since land is not depreciable in the eyes of the IRS, we subtract the land value from your purchase price to get your depreciable basis.Your depreciable basis is simply where a cost seg engineer starts from when allocating your eligible assets into either 5, 7, or 15 year property.In the scenario above, your starting basis would be $1.6M since your basis = your purchase price - the land value.Having an accurate land value is essential to getting your depreciation/bonus depreciation calculations right.This is the starting point for any cost seg study that you do.

IE I suggest folks study now to filter / buy top leads for your deal type.