There is nothing in my market that is desirable to me, so I did an off market mailing campaign to all 3/4 unit owners in my area using the auditors site to source them.

If you aren't using financing ask your realtor for comps.Get insurance quotes before you make an offer.Verify taxes on the county auditor's site.  

For example, you should ensure that your investors are accredited; do you have an auditor who will evaluate the investment status of prospective investors?

County auditor has picture of the house that made me buy it. 

It shouldn't be expensive to draw up, but you will want to be able to provide solid evidence of the deal to IRS auditors, estate attorneys, siblings, or any other interested parties in the future. 

Whenever I see a commercial building for sale that catches my interest, I save it then follow up on the auditors site to find out what it sold for.  

Many #landlords are unaware that Ohio law requires all owners of residential rental property to register with the county auditor.

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.