Your missing the hotel license, you need 11 rooms for this, guesthouses etc with less than 11 rooms can never be legal and are subject to extortion.
You mean that there is a real possibility that the someone may threaten the hotel owner and extort money from them? - possibly send some goons to the hotel to rough up the owner, perhaps break their legs, maybe commit some perverted sexual assault on them??

OK by me - my ex runs the business now - who do I give her address and phone number to?

Simon