How do I get accurate numbers when analyzing deals?

[Colton Blessen]

I feel like I'm "fluffing" the numbers too much when I am analyzing properties. What types of resources should I be using to get more accurate numbers? I'm currently using rentometer, homes.com (for home values), and a few other websites. Are these trustworthy sites or are they just ball parking the numbers? What are your opinions on the best sites to use and the ones to avoid?

Thanks in advance,

Colton

[Michael Noto]

Good advice by @Joe Villeneuve

I think Zillow and should trumpet more that they have very accurate data in terms of past closed sales, tax info, etc..

They seem to showcase the Zestimate which is usually wildly inaccurate at least in my area.

For rentals, I find rentometer to be reliable in suburban/urban areas where there is a good amount of data to draw upon.