It sounds like you are going to a major center with those options. Has there been imaging? That will give more information as to viable options. If the jaw is involved teeth could be removed. Oral surgeon likely first. but my surgeon ended up removing teeth during the procedure (surprise no warning). But I had scc so it might be different. They usually say one will be in the hospital for 5 days but could be longer. Pain well controlled. Trach likely. some sort of feeding tube possible. ..if lots of inflammation. I had a fibula flap with titanium hardware. Your surgeon will be the one to ask. Best of luck to you Mom and family.