No one wants to deal with a state audit or agency.

You should be able to get an address from the county auditor / property search.

That's a nice deduction which you could probably come up with some argument to the tax auditor why its a legitimate business expense. 

Not a flipper here but you could always call/email the county auditor if you have questions about a parcel.

Have you utilized the auditors website?

Should I be using personal property bank account or the holding LLC bank account for these generic expenses for most tax benefit and least risk of audit? Or

I take it you have used the local county auditors website to look up the current owners name and mailing address, if it isn't the current property. 

I went to the County Auditor website and saw that it is zoned as a 2-family and land use is also 2-family.

So, when an auditor is looking at about 8,000 to 10,000 of my records and asks for an invoice I know exactly to the exact page number where every documents is located.

@Corey GilroyTo reclarify, just checking other listings for permit numbers is one way to check if there may be permit regulation.Obviously reach out to the local zoning department, county auditor, and county permitting department for the most accurate route.