Do you use any other data sights that might help determining accurate numbers? 

Single boiler serving a duplex- landlord paid water / natural gas because there's no way to split it accurately. 

Seller shall provide such documents and information, representing them to be true and accurate, within _______calendar days after acceptance.

If the software is not simplifying your life or making you more accurate, you shouldn't use it.

To get accurate information on renting by the room, check with a local investor-friendly real estate agent.

BP rent estimator has been rather accurate in my searches.  

But one thing we do is if the project is extensive (which usually means more potential surprises), we'll have our service providers walk the property with us and provide more accurate estimates on their SOW.

If the software is not simplifying your life or making you more accurate, you shouldn't use it.Software does have extremely helpful features like online payments, marketing syndication (click a button and your property is advertised on multiple sites), electronic document review/signing, maintenance tracking, and owner reports.

I am seeking reliable data and cannot solely rely on platforms like Zillow for this information.Thank you for any assistance you can provide.It's really best off to have an agent with access to the MLS to pull accurate data related to comps when underwriting a deal. 

About as accurate as CarFax.