I doubt you can get the Health department data as that would be most likely a HIPAA violation if someone fell ill on the property. 

- The seasonally adjusted purchase index jumped 12% from one week earlier, according to data for the survey ending April 24 and released Wednesday by the Mortgage Bankers Association.- "The ten largest states had increases in purchase activity, which is potentially a sign of the start of an upturn in the pandemic-delayed spring homebuying season," said Joel Kan of the MBA. - Mortgage rates also fell to another record low in the MBA's survey, as the 30-year fixed rate decreased to 3.43%.

The numbers makes sense but I can't make heads or tales of whether the data presented is good,  mediocre, or terrible.  

The utilities are a ballpark estimate from online data. 

But when it comes down to it you need to know your area and be aware of the shifts in value, based on local economics.Remember, property value is not a specific number and any number you come up with or pay someone to come up with is an estimation. 

Normally you can go to list source and pay for a list of addresses that match criteria, but Idaho is one of very few states were data isn't public.

Use Redfin their data is 10x better, because they pull from MLS well, whereas Zillow tries to pull from everywhere but does so poorly.

I’ve been using apartments.com and searching apartment communities that meet my investment criteria in my target markets and then compiling my own data base once I determine their PM company.

The 2-3 years you experience negative will likely be outweighed by the gain in value. 

And, when properly maintained, even though you get a depreciation write-off, the asset often appreciates in value.