This is from the BP rental calculator and is exactly what I'm wanting to see, just with extra payments each month. 

This designation doesn’t cost extra or give the manager access to insurance payouts but ensures you and the property manager are aligned during incidents, such as tenant lawsuits or insurance claims.

So, if you know this, you can offer 3K above liens (which they think are 15K) and the liens from the last 7 years might only be 4K.You could negotiate with a seller of a property with extra road frontage to buy an easement and then buy the landlocked property behind it. 

Quote from @Caleb Brown: Someone else asked but what would market rents be including the extra storage?

I looked into the maintenance option years back to discover a trend of:  apx. 8% monthly fee which only included rent collection (everything else from maintenance to turnovers etc, extra, and poor reputation on repairs.)

-Have an extra umbrella policy-Speak with my real estate attorney to make sure I did enough to limit my liability. 

A longer timeline will make paying the extra 2% now more attractive.

Any taxes not owed, a seller merely file a tax return with the state, just like any other tax returns filed for extra taxes a government has with held. 

They don’t charge anything for these extra accounts, my tenants pay directly into those accounts.

Or add an extra garage.