Welcome to Healing Well! You've already gotten some great advice and information. I agree completely. Surgeons do not tend to tell their patients just how challenging the recovery is. Is it because they don't know themselves? It's possible. Maybe they need to visit this forum!
Here is my early recovery journal:
Like you, my lungs were HORRIBLE prior to surgery. I had a lung infection that just wouldn't quit. I was using my nebulizer several times a day and taking high doses of inhaled steroid. My asthma doc and PCP made sure that I got a steroid boost at the time of surgery to help me get through it. This is because an asleep adrenal gland can cause problems during a trauma like surgery, and if you're on high doses of steroids, it's likely to be asleep. Mine sure was.
Be sure your surgeon knows all about your steroid load, as it may change what he does. My internal tissue was very fragile because of it, so my surgeon added some extra sutures to ensure that it held.
I planned to go back to work half time after two weeks, but I'm a second grade teacher, and my TA and princpal (and my PCP) wouldn't let me. My class was full of sickness. I ended up staying home 6 weeks (during which time I was being treated for my continued lung infection. My doc gave me Rocephen shots, so I wouldn't have to take antibiotics into my healing stomach, as my stomach is very sensitive even without surgery.).
The surgery was the best thing that I ever did. It took two and a half months to heal my sick lungs, but after that my lungs were GREAT! For the first time in 5 years, my lungs were healthy.
I would say this. If it's possible to hold off some with the nebulizer prior to surgery, it would probably be good. My asthma doc had me do that, because the longer you use it regularly, the less help it gives you. He was concerned that after surgery it wouldn't work as well, and that I would need it even more then. When you cough, you'll want to hold a pillow to your incisions, by the way.
If you read through my recovery journal it'll give you an idea of recovery for one person with sick lungs!
Go for it! You'll be glad you did. People like us don't really have a choice. It's literally a life or death situation.