I would say no - that a PO box is not acceptable for rental history.

So accepting and approving multiple applicants is the norm?

Having watched many prior co-workers get paid, cash their check at the casino, and promptly deposit it all into a slot machine I can tell you with pretty good certainty that casinos don't have a positive effect on disposable income and good use of the existing income in the area surrounding :)Are there solid local employers OTHER than the casino in a 15-minute drive? 

The Seller has 3 choices; Accept, Reject, or Counter. 

We do not accept zelle because of how easily it can mess up an eviction in Chicago.

But if your goal is to earn tax deferred income and appreciation you can pass to your heirs tax free you can accept less. 

Also, is your ad making it very clear that evictions are not accepted?

I'm curious to hear how other property managers and landlords are navigating this.Here in College Station, TX, I don't accept Section 8 applicants.

I don't think this is something new, for the past few years I noticed the first 48 hours I post a rental listing I get a few emails asking if I accept section 8. 

They only accept cash.