Both tenants in duplex are having problems paying rent

[Nathan Mount]

Here's my scenario, and am looking for some help figuring out how to handle it.

2 units - leases end on Oct 31.

unit 1 - renter came to us last week saying she wants to apply for rental assistance thru the state of Indiana because she's not working as much due to Covid.  She has consistently paid her rent, early, but now she needs until the end of Sept to pay this month.  She has a co-signer on the lease, which in my eyes, should take up the slack.  Do I contact the co-signer?

unit 2 - renter said he needs to pay Sept in 2 installments, which is fine with me.  But I'm worried he may have a steady income any longer due to the pandemic.

I don't want to renew leases if neither of them can pay.  Should I just give them notice now that we won't be renewing their leases?

Thanks