I'd make a list of what needs done and see what can be done to minimize the delay - try and create a timeline to give to the seller and buyer based on talking with the agencies/inspectors/bank/etc. and when they think they complete what needs done.

Did the tenant give any indication they don't plan to return?

Respond with minimal enthusiasm if they seem suspicious or dis-ingenuous. 

Participating in Syndications is a great way to learn and minimize some of your risk. 

BTW, you indicate you have other long term properties which I assume you have some leverage on those as well but maybe the renters are able to make their rents so no problem.  

I've found regardless of bank/lender size all of our lenders have been very open to assisting us in minimizing or deferring payments until the Coronavirus pandemic subsides.  

A lot of people give up after thinking of the first 10 people they know, but the real money is in the weak ties, the people that you have a minimal connection to.Also, I think to some extent, the SOI is tougher for new agents.

Most discussions with landlords I've seen indicate an intent to make appropriate business and ethical decisions to treat these people fairly and share the burden.

That left with $17.5k (less closing costs, but they were pretty minimal), which I then rolled into the next house with a similar strategy. 

A prudent approach may be something like:20% (or a fixed amount) cash50-60% index funds (with a stop order at 95% of value to minimize downside risk)20-30% bonds/CDs with 1-2 year maturity dates that overlap every 6 months.