I am leaning toward something with a Code rather than a key.

When I accepted the position of School Director and was sworn in, I was forced to resign my Auditor position as per PA School Code (law).Although our School Board in the 13th largest of the 501 in PA, it is still a local government position.

Don't educate your CPA to do their job.My CPA has real estate investments and owns the commercial building his office is in and rents out the other suites.He's also the type who get's his jollys off by reading tax codes at night. you can understand why I hired him

Check for back property taxes, and govt liens/code violations, that stay with the property.

Just ask them to terminate service at the pole, they can remove the line unless there is some code requirement for service to be provided to a dwelling.

Mailing to a group like code violators would also be great IF you could isolate the ones with equity.The list of names is CHEAP compared to the 6 month cost of mailing to it.  

The gain allocated to the primary residence portion of the property would qualify for the 121 Exclusion, which means that up to $250,000 in gain, if the person is single, or $500,000, if they are a married couple, would be excluded from taxable gain under Section 121 of the Internal Revenue Code ("121 Exclusion"). 

You should, at least once, that would be every 6 months.Repairs or improvements may not be made by a residential tenant that would be required to be depreciated, doing so leads to false tax deduction and depreciation schedules under the tax code, those tenants can not claim such expenses, if you do it's really fraud if you didn't pay for it.My rule is that if anything has to be opened up, unscrewed, disassembled or disconnected to repair it, it's my thing, not a tenant.

You may also want to check for involuntary liens such as delinquent water bills, code violations etc. 

But you can also find Allegheny County certified master plumbers who live within a zip code using this Health Department page.http://webapps.achd.net/Plumbing/Let me show you how this can work:In the 15025 zip code (Clairton), there are 12 guys on the registry.