Yes it is the client’s responsibility to pay for the client’s attorney’s work.

Yes it is potentially a medical malpractice case. Consult with experienced medical malpractice attorneys in your state. Use the Avvo search...

Contact your State’s Labor Board For example, https://dol.ny.gov/labor-standards-0

No you will not get arrested unless you are subject to a court order or subpoena.

You might have a lawsuit for maintaining a nuisance.

Put a demand in writing (if they own the house they likely have HO insurance). Or file a lawsuit.

The judgment, and all it’s terms, once entered by the court, is fully enforceable as if the judgment arose out of trial and not arbitration.

The Judge should have recused him or herself. A motion or contacting the chief judge’s department may take care of the situation.

Yes you can sue. Consult with experienced attorneys.

The unsigned copy can be ordered as filed by the judge or the judge may order the plaintiff to file and serve the amended complaint.