Hi Matt,
progression seems to be widely variable: some people start feeling weak in the morning and are under the breather by night, others may never reach that point. I, for one, was never paralyzed, though my motion was seriously compromised after a long, hot bath, around a week after the supposed trigger (a sinusitis crisis, apparently).
I had progressive pains throughout 3 weeks and difficult breathing from the 2nd to 3rd week, but nothing past that. In any case, medical procedures usually include preventive hospitalization and I think it’s a good idea to have someone always by her, in case things worsen. I recently knew of a woman in my city that was apparently recovering, then went home for the weekend and had a breathing paralysis while there were no one near. I wouldn’t want to take the risk.
As for your other questions, I guess others can help better, as I was a lucky case.