Too many strategies to address  on a post like this but I recommend you research all of the above.

They use a credit system where they give free skip tracing for 250 numbers+250 emails+250 email sends (which is nothing) then you are paying .08c for 1 number or email or address.

On top your due process, my advise is to trust your gut when vetting tenants.

I've never done one personally but my understanding is it involves the home being put into a trust, with the sub2 purchaser buying the trust from you.

Please consult your trusted professional in getting accurate information as it relates to the estate.This site has 1031 intermediaries that have far more expertise than I have about 1031 but 1) you cannot 1031 a pure OO property.  

Can I post an email address or phone number# 

They also have to trust you.

It offers flexibility as a landlord to be able to offer more or less rooms as needed, protection to the landlord in that you can hedge with adding LTR or STR to the mix, and simplification to the business as your only dealing with one address.

Does North Carolina law require sellers to disclose past repairs or damages, even if they have been fully addressed?

It might be payment notices are going to a different address and it is simply overlooked.