And finally most states have laws about how many days you have to change your information.  

Where to get the most recent and accurate data for things like:Unemployment dataPopulation growthJob diversity and top employers in the areaVacancy rates (eg huduser.org)Property taxes and jnsurance costsI saw bp pro and reventure and a bunch of other websites provide some of this data, but i wonder how accurate and recent it is.

Before finalizing anything, I wanted to get a better understanding of how to evaluate different real estate opportunities and what challenges might be posed. 

Based on our data, it. takes several hundred calls to even get an appointment. 

No data company is 100%.

The data they pull from the tax records on how much a home last sold for, often not updated, or completely wrong.

I've gone through 4 different ones in the past 4 years and I've finally found a good one.

@Abrahm Dimmitt,PropStream has a lot more data in it. 

Which platform offers fresher data for wholesalers propstream or property radar.

One thing that might be useful would be to look into using virtual assistants to scrub the data for you.