If he gets a lawyer, you should too.

The landlord is not likely to evict if the rent is paid timely. But a PoA is not like an assignment which is done with the permission of the landlord.

You need to keep a record of everyone who was willing to buy and find out whether they would be willing to testify. You should also find out, if...

Need to see the whole Deed to be sure.

Follow procedure and file for eviction.

No. And the only way you can withhold rent is by rent escrow in the local district court.

The parents of the teenagers are not responsible for their criminal acts.

Leave it blank. Continue your settlement negotiations.

Arbitration is costly and favors the company.

If the agreement are in writing, you may have a case. Talk to a lawyer.