How does a consult in oral and maxillofacial surgery sound--costly?

Depends. The fee(s) associated with an oral and maxillofacial surgery consultation can vary depending on the complexity of the problem you are being evaluated for. A more complex problem will require more time and possibly additional diagnostic studies which will impact the fee(s).
Absolutely not. And consider a second opinion. The procedure will probably cost a fair amount. So consider closest medical/dental school for treatment in the clinic.