The worst situation is when a contracting issue goes wrong and you have limited recourse with the State contractors board because the vendor was not licensed to begin with.  

Does the seller have any sort of engineering certification for the type of foundation the home rests on?

Step 2 (and only at the tenant's discretion) is to file a restraining order of sorts against tenant B.

You can then pay a VA (I use a great one from UpWork for $3.50/hour) to do all sorts of analysis.

+1 for Todd's recommendation...though I would never actually advocate doing something outside the law.Get creative, or get in line with an attorney so you can sort this out as soon as the moratorium is lifted.

Is there any sort of closing - we must need to record something somewhere? 

Sure, I had actually written about it in a previous post, here it is: https://www.biggerpockets.com/...It was the worst experience ever.

The numbers I need are impacted by the demographics you speak of, but the results for the best, worst, or middle ground are not universal to the dollar sign numbers. 

Sorry about your situation.I own condo units in Michigan, and while Michigan has yet (to my knowledge) declared any sort of pest (mice,roaches,bedbugs) definitively as an issue of 'landlords at fault' or 'tenants at fault' I have generally taken it upon myself to deal with the issue and, depending on the issue, trickling any associated costs down to the tenant. 

@Joel Owens, Hey Joel, I'm wondering what sort of commercial investments you would target coming out of this downturn besides STNL?