Having been one recently I can testify that they are likely sleep deprived, anxious over kids sniffles, and exhausted from moving in.Are they concerned about lead or other contaminants?

Your only option is to file a N5 (reasonable enjoyment) keeping in mind if the upstairs tenant is not prepared to testify at the hearing you will be wasting your time doing anything.

The contractors, unrelated to the sale, that testify that this was an existing condition that was covered up with paint is yet another piece of the puzzle.The fact that this Seller is a contractor gives him assumed knowledge that he should have regarding these types of items. 

@Adam FanslerAre you saying that Columbus courts will hear an eviction case on the basis of an affidavit and without the landlord / PM there to testify as a witness?

the person who is responsible for collecting rent is who testifies about nonpayment, condition of property etc.

I guess that testifies to how good it is since nobody wants to get rid of it. :)If anyone has a used copy of it to sell let me know.

I've just told him that if we get audited he needs to come testify that the work was done ;)No references for HVAC.If you can't find their contact info through a google search please shoot me a PM and I'll send it over (don't think I can post it).

The witness will be able to testify that you did not remove anything valuable from the house and that you didn't just record the trash that was left behind instead.I believe as a part of the Protecting Tenants and Foreclosure Act of 2009 that property isn't left behind and automatically considered abandoned, and notify the owners of the personal property (owner's heirs, if any) that they have 90 days to remove it.

Just had to testify that there are a couple people on here that get things done.

We need an agent of the property to be able to come to court and testify that the suspect was not authorized to be there.