The concerning part is we are in a state with an eviction moratorium and we don't know what's going to happen in January.How do we have assurances that the tenants are actually paying? 

I am simply third party. 

I'm sure the OP understands that the standard long depreciation schedule applies to the purchase of the building.I believe the only point the OP was trying to make is that her CPA informed her that you don't need to hire an expensive out-side party to perform a cost seg study to take advantage of accelerated depreciation.

It just shares a party wall.

Being asked if the minimum credit score of 620 for a rental is a combined score between all parties on the lease..... lol needless to say they did not make it through the screening process.

He is now interested in doing a deal with us and I'm a bit hesitant because involving another party I'm sure can get complex.

Your guests 'may' miss some of the amenities, but the hassle of fines for speeding/registration, the yearly fees, the calls from the admin office that your guests are partying naked in the street, or spread trash everywhere, just aren't worth it.

Whatever both parties are comfortable with, but full disclosure and transparency should be a good starting point.

I suppose it is a possibility though, so you'll just have to do your best to evaluate the other party.

If you're not party to the contract, they have no right to request your information.