. $50,000) but make their offer contingent on an in-person walk-through within 72 hours or a review of the financials within seven days.

Did you walk them through troubleshooting steps before calling a technician?

I have to walk the properties and get some pics, maybe you’ll be interested in taking them off my hands ?

We are also not likely to see people just walking away from severely underwater properties, because nearly every market's real estate prices are well above pre-covid levels. 

My contractor walked the property with me yesterday and we found obvious costly issues that make the home a bad buy and the current tenant gave us insight on big issues with the property.

Get a contractor friend to walk a property with you, and give you ballpark ideas on what needs fixing, how much it should cost, and anything else they see that would concern a buyer.  

Ben, there are many steps you need to walk through before worrying about plans.1.

Anecdotal story:  I just walked an industrial property that we are in contract for (single tenant, NNN lease).

Long answer, they can walk you through anything that could possible come up and they provide more protection with their license than you do as a sole buyer.

If I list with a realtor for a discount and pay 100k in fees (commission, taxes, closing, deed, etc.) then it just hurts my ability to walk away since there is a mortgage left on the property, though much less than either asking price.