You can get all sold data from county or propstream but it won't have "sold for" price.

Alternatively you could just take the drywall you test fit, throw a little construction adhesive on the back, slide it in behind the trim, and use some "mud framing" to reform the corners, give it a quick sand, paint, and caulk.

Can anyone tell me how accurate the crime data maps are?

OneSite really shines with the data analytics.

This is also a great way to test out the STR model in your area rather than going all in on a SFH. 

What do I do if the Buyer Estimate from a real estate agent does not have matching data to BP tool calculations?

Looking at the free data on AirDNA, it shows a 74% occupancy rate for the entire town but I don't know if that translates to this particular property.   

Or you can become an agent yourself and get the data yourself although becoming an agent does require a fair amount of time and money.

Sometimes Zillow or even the MLS will bring in public records data, and will show houses as have 1.5 baths or 2.5, etc.  

After this I would ID a few markets close by - 1 hour by driving - and run a few numbers. test the market using your metrics for your goals and if they do not work move to another market.