What can be done about my elderly father that is becoming very delusional and lives on his own with very little resources?

My father is now having daily delusions usually about theft, legal issues that don’t exist, being “held hostage” in his apartment, having his driver’s license taken away, etc. He is calling me non stop and leaving messages about these issues. I’ve had to block his number but I still get the voicemails.
This has been progressively getting worse over the past several weeks.
I had the police do a welfare check and they said he was not a danger to himself or anyone else. They told me I could file for an emergency petition but that will only get him sent somewhere for a 3 day hold.
I am not close with him. Never have been. But I have always been his “go to” person when he needed something. He stopped speaking to me in October (you can read my previous question thread for the details),
I do not want guardianship or anything like that, but I do feel a responsibility to take some action since he is my father.
He does not have the financial resources for a care facility and I don’t think he qualifies for any Medicaid care since he is still feeding himself, bathing, etc.
He has no one in his life.