It all revolved around their PR algorithm .

How does the algorithm work here?

I would never use ANY algorithm to do my research.

Looking at the sold price, I found the following algorithm is still working to predict the sold price in our market.Find the baseline price in 2013, and add between 5-6% every year as appreciation, the range of sold price in 2023 is within 1 sigma deviation of 2023 value. 

What softwares do investors use for administrative tasks or other algorithms used to help your work flow?

The other model I planned in using is to treat some data similar to an algorithm, the use of Newton's method of approximations of differences.

Yet it was listed as a comp and even though she had a recent closing on her house which should help establish her value, their algorithm still listed it at less than half of what she paid.

I have no idea how they would algorithmically compute the value of a dock, tennis court, RV parking, or really any other high dollar added feature.

Keep in mind Google's algorithm is never completely revealed.The only piece that you need to hire out, if you are not tech savy, is building the site.  

I've seen mortgage inquires have zero affect on borrowers.Shawn hit the nail on the head mortgage inquires during a specific time frame will only count once although they will show each time.Here is a link to thread where I just addressed this.https://www.biggerpockets.com/forums/311/topics/310884-credit-run-buy-unknown-sources-multiple-times For more info I'd suggest checking out myfico.com  This post is 100% correct, especially the part about FICO treating their exact algorithms as a trade secret.Very expensive "FICO simulator" software that we use internally that lets us throw "what if?"