You may get better tenant retention if: (1) the tenants are paying utilities; and (2) the existing windows are so old that it barely insulates.

Annual Gross rents: $63,600; Annual Expenses (insur, utils, repairs/maint, city fees, management fees, prop tax): $17,483; 20% down pmt: $140k, mortgage: $560k, estimated pmt: $3650 (includes taxes, insur);  Based on this, the NOI = $46,117 - total exp of $17,483 - debt svc of $43,800 makes for a DSCR of 1.05.

I own an office building with parking spaces reserved only for tenants and their customers during business hours.

Rentals between the utilities and paying a property manager etc I saw where avg only 300-400 a month take home.

We had no customer service plan and were using crappy software in all phases of the business. 

This is free and screens them by having them answer my custom questions to see if they will qualify.

Fortunately, I have sold a property last week and utilization will soon be seen as 8%.

Simultaneously I was doing admin, customer relations and exhibitions for museums in Balboa Park. 

Also every forum post helps with getting the word out there for my book with BiggerPockets and podcasts with them, so that doesn't hurt either.Either way, even people who utilize BP for some of their lead gen will probably tell you it ends up starting out as work but becomes almost a hobby.

Great customer service and open APIAppfolio is super easy to use but customer service after set up is terrible.