Looks like there may be assistance (grants) to help you remove them. 

But beyond that, is there any way to apply for any assistance, or what is the best plan forward? 

There is guidance on the FHFA site for mortgage modifications and forbearance:https://www.fhfa.gov/Homeownersbuyer/MortgageAssistance/Pages/Coronavirus-Assistance-Information.aspxThis appears to be the revamped HAMP program. 

We do not know yet how many actual renters are affected nor do we know what assistance will be available to anyone laid off or sick.  

Given you have full occupancy thus indicating good demand, I’d start marketing the salon space for a new user/use.The current madness will NOT persist very long given this is not a virus with high double digit fatality rates.The real issue is that your business as saloon isn’t working, so count your blessings and transit to being a landlord instead.

I just bought anything I could get Owner Hold, rehabbed, rented, then refi'd as rates dropped to single digits.

If a tenant needs assistance, we will of course work with them.

I'm not sure what part you are looking to purchase but if I can be of any assistance in what you would expect through your transaction(might be slightly different in all states) let me know how I can help! 

I have some inquiries from people on social assistance who indicate they can afford the rent.

Well respected and can either assist or direct you in the right direction.