Then coding the p&l can happen. without the Balance Sheet, I don't know if I am missing transactions.

Honestly seems like a little overkill on this decision - unless its strictly a rate-term refinance because rates have dropped, it usually just should come down to a side by side comparison of status quo vs. refinanced (+ how any cash-out capital is deployed)

I'd be a fool to think they'd make more strictly wholesaling.

I can get a list of about 6,000 after applying zip code filters, room count, etc.

An RMLO license does not teach mortgage brokerage management, it's a very basic license to originate loans under strict guidelines....originate, not underwrite.

And the code enforcement back even 10 to 15 years ago was non existent. 

One is strictly investment, where the neighborhood/location is not important just the potential for upside and low cost living.

I know you code C++ well enough to create bitcoin. 

By zip code only or zip code + 4 digits?

Under $150, easy to install and use, tenant can set their own code but landlord can retain the master and always have access, tenant can't lock themselves out, standard key for emergency backup, batteries last a couple years, etc.