Seems like the definition of buy n hold RE regardless of if relying on cash flow or appreciation.Cash flow, in addition to having the actual cash flow reduced such as Las Vegas and Detroit (as two of the worst examples) in the Great Recession (GR), there are other ways to loose money including the loss due to not keeping up with inflation (most of the cheap Midwest areas), natural disasters (could be anywhere but lately it has been South exposed coastal via hurricanes and tropical storms (Texas, Loisianana, Mississippi, Alabama), Ca via fires (Paradise, San Diego twice, Ventura area), and tornadoes (middle of the country), and large beyond planned cap expense items (could happen just about anywhere but good due diligence and conservative cap ex estimates can reduce the risk).We had RE duplex (STR) in Gulf Shores Alabama that we sold after it was hit by 2 hurricanes. 

Depending on how mad the tenant is, they might decide to trash the unit (worst case scenario). 

I get the vacancy and rental drops through the last couple of recessions (since each recession is different and often the last recession was not the worst for multifamily) for that particular area, and then apply them to the weakest year in the pro forma.

The worst you will be out is a little time and effort.You also have to consider how much they will let you show the property. 

It’s not rocket science, you can learn this easy enough.What’s the worst that can happen?

Worst Case Scenario... 

So let's take the worst scenario of 15K on top of 30K purchase on a 2bd 2ba that market rents are $750-1000/mo.

Good thing is its not the worst part of Columbus.. for $100k I would try to find something in Grove City but will be a struggle

The worst case scenario is that they say no.

At worst, the tenant can give you a 30 day notice to terminate immediately and you would keep most of the security deposit based on the timeline.