Hello and welcome, Kate ~
Of course I regret that you were given a diagnosis of an acoustic neuroma but it beats MS, I suppose. I want to thank you for joining the forums and I hope we'll be able to help you with your questions. Let me try:
1. Experience counts with AN removal surgery. It's very 'delicate' and not that common. Any surgeon with less tha 100 of these surgeries would definitely be a concern to me. I rejected the first neurosurgeon I was referred to because he rather reluctantly admitted, after much prodding, that he had performed 'perhaps' 60 such operations. The neurosurgeon I eventually selected had thousands of AN removal surgeries on his resume - and he wasn't with HEI. There are many surgeons with respectable AN removal experience available but you may have to do some searching to find them. We have a few members in Australia that had successful AN surgeries. They post here often and may be able to give you some direction.
2. I would prefer the surgical team have worked together before. It certainly seems logical that a team with prior experience together would be preferable. My neurosurgeon had a longstanding 'hand-picked' team (including O.R. nurses) which gave me confidence. He refused to perform AN surgeries at a prestigious, teaching hospital nearby (Yale Medical Center), even though he had privileges there, because he would have to use Residents and Interns and he refused to do so with his AN surgical patients. I had to admire him for that level of concern and professionalism.
3. Again, this is simply one person's opinion - and I'm not a physician - but I would assume that a surgical team that had experience with larger tumors would be preferable. The surgeon does the actual removal but his support staff (doctors, nurses, etc) are invaluable and their collective experience is crucial, in my opinion, as anything could happen and you want an experienced team of professionals that are capable of handling whatever situation may arise during the surgery.
I hope you'll visit the forums often. We know what you're experiencing and we want to help in whatever way we can.
Jim