Working with two different professionals in two different locations will prevent either form being able to see your big picture and plan/adjust accordingly. 

Power of Sale Notice Requirements: Prior to initiating a foreclosure the notice of foreclosure sale must be advertised at least one per day for three (3) days or once per week for two (2) two weeks in a newspaper of general circulation in the county in which the property is located.

I manage my own and expect you cannot do to location, but I have family that uses property managers. 

I currently live on Long Island and work in Manhattan so I spend a lot of time in both locations.

I see you are located in Houston.

It is a duplex located south of Atlanta.

Her attorney says it cant be sold unless the mortgage company - a Richard Gill Mortgage Company located in Texas, releases the deed on this Colorado house.

You said they are a regional business with multiple locations?

The house is a knock down on .3 acres in a prime location (12 min walk to NYC train) where a 4BR/3BA new construction will have an ARV of $950-975K (I have a modular builder to partner with).  

-Is the property located in a good area?