Phew, you clearly got things cut out for you :(
You'll clearly have to discuss some more with your doctors, this is a complex case and we cannot help too much, only with some ideas of our own and experiences. The best call is to discuss it all with professionals.
Now some ideas
1. I would have an implant, if I needed to replace a tooth. It's not an easy procedure, but you've been through palate surgery already so kinda know the drill. I personally don't like the idea of using 'bridges', would rather have my other teeth left alone and the one that's missing being implanted there. Sure, the final decision is your doctor's, maybe you're not eligible for this or it's not a good idea. I'm talking about personal preference here, but I never had to discuss/decide that. If you're smoking, it's clearly gonna have to stop in this case (I think it's a good idea to not smoke at all anyway).
2. I have never been through a surgery like this, but from what I read from other patients in the past years, each person deals with it differently. Some recover very fast, others take more time. It's a surgery in the end, so it's not something that simple. Again, the best bet is to have a chat with your doctor, share your fears and how you feel. This way you get a professional opinion and maybe some ideas to better deal with the recovery.
3. Wearing braces in itself is not such a huge deal, but most of us didn't have to deal with the issues you have, so we have no idea if it will bring even more pain to what you're already suffering. The first days in braces are painful (depends again on how you deal with the pain), but the soreness subsides after the teeth are 'mobilized' and start moving. You'll feel soreness when the braces are tightened (every few weeks), but this again depends a lot on your pain threshold.
In my case the pain lasted for 4-5 days, in which I ate only soft foods. My teeth hurt only if clenching them, otherwise it was OK. It was pretty bearable, so I never used the painkiller my doctor prescribed, didn't feel the need to.
Let's see how the recovery comes to an end, I think it's your main priority now to feel better and stop having those pains and other symptoms. I would have a chat with the doctor though, it's always a good idea to have a professional see you and provide the much needed input and encouragement.
Keep us posted and I hope to hear good news from you ;)