Maxine ~ Re: your question regarding when to obtain a hearing aid:
AN patients who are SSD (Single Side Deaf) either have a BAHA (Bone Anchored Hearing Aid) abutment implanted at the time they undergo the AN surgery or a few weeks later. Some AN patients wait until they are sure about their extent of hearing loss before opting for either a BAHA or other hearing aid device. As you can see, there is no hard and fast rule on this. It's a personal choice. I'm SSD and don't employ a hearing aid. It works for me and I accept the limitations. However, I'm retired and don't have to deal with a workplace environment and I don't have young children, making my choice much easier. Besides, my 'good' ear works quite well.
There are many threads and scads of information regarding BAHA and other hearing aids in the ANA forum archives. Just use the search function to find them. Type in BAHA and you'll see many threads pop up. In addition, some of our members have a lot of experience with BAHA and other hearing devices and will be glad to share their expertise with you, I'm sure. Jan B. ('leapyeartwins') is our go-to person for BAHA information. I'm sure she'll be along soon to help answer your questions about hearing aids.
One note that relates to your doctors comment about the choice between surgery and radiation; although he is correct that AN removal surgery is usually complication-free (mine was) but if there are problems they can be daunting, I have to add that although radiation treatment is far easier and faster, it, too, has risks. In addition, radiation treatment requires annual MRI scans for many years afterward to ensure the radiated tumor hasn't re-grown. These are not insurmountable risks by any means but I wanted to make sure that you weren't led to believe that radiation treatment is a panacea. If it were, no AN patient would opt for the more complicated surgical approach. I underwent both procedure; Retrosigmoid 'debulking' surgery followed by 26 FSR treatments. The intent being to destroy the tumor and spare my facial nerves. It was totally successful. No surgical complications whatsoever and the radiation, while tedious, was uneventful with no side effects. Obviously, one persons experience is not a template for every other AN patients experience but I certainly hope that your experience will have a similar outcome.
Jim