The tower companies decide all on their own based on all kinds of data and metrics they determine. 

@Ryan Dossey do you find Skip Genie to provide accurate data?

It is amazing how many people use initial cash flow as though it is the only item that dictates total return.I am not an expert on San Antonio, but if it were my property I would look at indicators like population growth, vacancy rates, quality of jobs and schools, wage increases, historical appreciation data, etc. and use that data to determine the likelihood of market and rent appreciation. 

From what I see on the city tax assessors website there has been an average 2.8%/year appreciation for the last 16 years (all the data I have on the website).

*Section twenty-six prohibits the Office of Court Administration fromselling housing court data to third parties.

Everyone knows things are back to normal where homes based on past data need an adjustment.

All my data shows the midwest (which I dont Know) But you may be right.

Sort of like having an Amazon storefront while they collect my data and then compete against me later. 

I want to start buying in bulk and I would like to gain access to the source rather than purchasing through resellers. Thank you

If you don't have access to this data, shoot me a DM and I can pull some numbers for you!