I am so sorry. I just saw now that my answer did not post. I provided it immediately. This tends to happen from time to time but I never know when it happens or why and I am really sorry about that.
I will provide my answer again right now.
The landlord, aside from being a total creep, is a bully. He has no possibility of bankrupting your friend and that sounds like a mean and nasty quite ridiculous threat so please tell your friend that this is what I am saying. She has no reason to be terrified of some ridiculous and pathetic man.
She did not cause damage to the carpet and she left the place impeccable. He is angry that she has gone and angry that he didn't get what he wanted with her. He owed her a duty of care and she had the right to peaceful enjoyment of her home and he denied her that duty and that right. She should be seeking a rent abatement.
He will have to prove the damages if he wants to collect and he won't be able to do that as your friend didn't cause the damages and has witness she can produce and should. As well, he failed to comply with his legal obligation to do the inspections and make the reports and so has little likelihood of succeeding even for that reason alone.
As well, the $7500 is patently absurd and I am sure the adjudicator will see this for what it really is. It is a punitive action by a man that was rebuffed by a tenant.
But be sure your friend tells the adjudicator about this man's advances so that his motivation becomes clear.
Does that help?