I check things like taxes on the county auditor site to confirm numbers and the use my knowledge of rents in the area to check the validity of the given rental income.  

If the audit leads to a different outcome, and your point is still arguable, appeal to an investigator or higher level auditor.

I have heard of auditors actually going to a home and inspecting and if a television was thereit had to be justified as a business activity, otherwise the room was considered an additional living space and occassionally used for business thereby disqualifying all the deductions.I have been through this several times when I used a home office long ago.

The MLS states the home is not in a flood zone, however the Auditor site shows the flood zone just short of the dwelling almost touching the stoop.  

As anyone can look up the transfers of properties on a county auditor site.

Check the value the county auditor site has listed right now and if it's lower than your purchase price plan to adjust accordingly.

Visited the county auditors site.

Depending on how much business you actually get in renting that house out on AirBNB, it may be an issue to sell that to a tax auditor should you ever need to.The second issue that I had was that there are rules about equity positions between former and exchanged properties.

The county auditor may have an online searchable webpage.

All strategies require a list.You can get a list for free on the local auditor/appraiser site.