every house in a .1 mile radius sold before it was even                                                                                    Just because every house nearby sold quickly means nothing.

Check out https://www.awning.com/airbnb-estimator and run an address of a property to see what all the places are nearby.

But if you'are active investor and live in very appreciating location like in Cupertino,CA ; then accumulate nearby housing is way better. 

(see below)My last three commercial deals in my town and a nearby town have all failed because the sellers are insane.

This region is nearby Yosemite national park and Turlock, CA

(Scenic picture of nearby famous East Lake Golf course for algorithm)

As an example, you may have a property that one of those systems says has a "value" of X (let's say $500K), and they have all sorts of nearby "comps" that are in the same value range.

I am looking for light value-add Class B small multifamily 2-4 units in Houston TX, preferably Friendswood, Webster, Pearland, League City or nearby areas that can be positioned as Mid Term or Short Term Rental.  

Vegas is nearby to you and could likely check up on it a couple of times a year if needed. 

Now, what I do for the MTR pricing is look at the "comps" for any furnished units on Zillow, Realtor, etc. and also go onto the OTAs and price out nearby comps.