@ savingdogs
I'm sorry you are having a very difficult adjustment. Just a few suggestions/comments
* Set up your profile to accept PMs. It's a little intimidating to send someone who wrote a long beautiful post just a brief comment or two publicly. You might get more helpful advice if people could send it to you privately. I almost didn't post.
* You have two issues, obviously. Hearing loss AND balance issues. It might pay to find a forum or yahoo group for people with meniere's online.
* I really don't think most people who are deaf will reject you for getting a cochlear implant. There are mean, unreasonable people in every group but they are usually a minority. There are people who are culturally deaf that also use CI or hearing aids.
* If you can get a good webcam, there are many people you can sign with online. There's a thread at this forum for example for people who are looking for others to practice ASL with.
* From what I've seen, most people are not in favor of making up "home signs" -- but if your husband has athritis, I think that justifies an exception! I suggest making up your own home signs for the problematic letters or borrowing some from other sign languages. Maybe your husband would have better luck with how the British sign the r, m and n letters. You seem extremely resourceful and I'm sure you could find resources online for BSL and other sign languages, and use those SLs for ideas.
* It definitely has to suck that you can't do the things you use to do.
** Someone here at the forum recently recommended that I read a book about the brain's plasticity.
I did and it's an interesting subject. I would consider doing research to see how likely it is that you can regain some of your balance abilities by just using your eyes and learning to ignore the wacked out signals from your vestibular system. The book I read indicated that adult brains are still plastic and that there are techniques that can work. IIRC, it did mention a case history of someone with balance issues but it did focus more on people who had incurred strokes. However, while it did list sources at the end of the book by chapter, there were no traditional footnotes -- so you may want to start off researching this with another book or at
pubmed (the govt's center for biomedical literature).
** Consider this an opportunity to develop new interests and hobbies.