Lenders can only use the data to help you qualify if its real, not pro forma.

Historically speaking on average absolutely not. 

Deonte Singleton given that you have Redfin in your area, I would use it instead of Zillow to get the most recent data as it's connected to the MLS.

I'd hardly say there has been an unusually high demand for rentals compared to historical norms.

Professionals use a CRM to track everything and its very simple when you pull a list to mail you upload all that data into a CRM and when somebody calls you that you mailed you enter the call information into the CRM including number/date/price etc etc.

Downtown is seeing lots of revitalization right now within the historic neighborhoods, very walkable with that "hip" vibe.

Merrillville was more moderate in the 4-6% range (I'm slightly analytical and track this data).

Insightly comes with set data fields in its apps which are designed for small sales companies (and most likely will be empty fields in REI) but you can still add more fields like in Podio but it is limited in the free version while Podio is unlimited in its free version.Insightly also has the ability to track email comunication.

Determine your approximate Rehab costs and subtract it from the ARV to get your offer price.Use all the negative things (Vacancies, poor condition, Rehab/Pending CapEx, lack of data) to justify your discounting the price.  

All data is scrubbed against the national DNC list.