Not to be unsympathetic but she paid cash and did not leave with the hot little title in her hand? Like she trusted a 'stealer'? By now she's realizing that having the title in hand is as important or maybe more important than having the trailer in her drive. Think it is now well past time for her to hire an attorney. Not something she should be playing telephone tag with.
Do you have the whole story? Has the dealer submitted the old title to her state DMV and is waiting for the DMV to mail it to her? Has the dealer been asked to show evidence that they submitted the title to the DMV. Has anyone spoken with either her state or the dealer's state AG office that regulates 'stealers?'